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	diff --git a/src/core/partmodel.cpp b/src/core/partmodel.cpp
	index 06e2fb0..fcdcb8c 100644
	--- a/src/core/partmodel.cpp
	+++ b/src/core/partmodel.cpp
	@@ -1,596 +1,577 @@
	// SPDX-FileCopyrightText: 2016 Sandro Knauß <knauss@kolabsys.com>
	// SPDX-License-Identifier: LGPL-2.0-or-later

	#include "partmodel.h"

	#include "htmlutils.h"
	#include "objecttreeparser.h"
	+#include "utils.h"

	#include <KLocalizedString>

	#include <QDebug>
	#include <QGpgME/Protocol>
	#include <QRegularExpression>
	#include <QStringLiteral>
	#include <QTextDocument>

	// We return a pair containing the trimmed string, as well as a boolean indicating whether the string was trimmed or not
	std::pair<QString, bool> PartModel::trim(const QString &text)
	{
	// The delimiters have <p>.? prefixed including the .? because sometimes we get a byte order mark <feff> (seen with user-agent:
	// Microsoft-MacOutlook/10.1d.0.190908) We match both regulard withspace with \s and non-breaking spaces with \u00A0
	const QList<QRegularExpression> delimiters{
	// English
	QRegularExpression{QStringLiteral("<p>.?-+Original(\\s\|\u00A0)Message-+"), QRegularExpression::CaseInsensitiveOption},
	// The remainder is not quoted
	QRegularExpression{QStringLiteral("<p>.?On.*wrote:"), QRegularExpression::CaseInsensitiveOption},
	// The remainder is quoted
	QRegularExpression{QStringLiteral("> On.*wrote:"), QRegularExpression::CaseInsensitiveOption},

	// German
	// Forwarded
	QRegularExpression{QStringLiteral("<p>.?Von:.*</p>"), QRegularExpression::CaseInsensitiveOption},
	// Reply
	QRegularExpression{QStringLiteral("<p>.?Am.schrieb.:</p>"), QRegularExpression::CaseInsensitiveOption},
	// Signature
	QRegularExpression{QStringLiteral("<p>.?--(\\s\|\u00A0)<br>"), QRegularExpression::CaseInsensitiveOption},
	};

	for (const auto &expression : delimiters) {
	auto i = expression.globalMatch(text);
	while (i.hasNext()) {
	const auto match = i.next();
	const int startOffset = match.capturedStart(0);
	// This is a very simplistic detection for an inline reply where we would have the patterns before the actual message content.
	// We simply ignore anything we find within the first few lines.
	if (startOffset >= 5) {
	return {text.mid(0, startOffset), true};
	} else {
	// Search for the next delimiter
	continue;
	}
	}
	}

	return {text, false};
	}

	static QString addCss(const QString &s)
	{
	// Get the default font from QApplication
	static const QString fontFamily = QFont{}.family();
	// overflow:hidden ensures no scrollbars are ever shown.
	static const QString css = QStringLiteral("<style>\n")
	+ QStringLiteral(
	"body {\n"
	" overflow:hidden;\n"
	" font-family: \"%1\" ! important;\n"
	" color: #31363b ! important;\n"
	" background-color: #fcfcfc ! important\n"
	"}\n")
	.arg(fontFamily)
	+ QStringLiteral("blockquote { \n"
	" border-left: 2px solid #bdc3c7 ! important;\n"
	"}\n")
	+ QStringLiteral("</style>");

	const QString header = QLatin1String(
	"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\n"
	"<html><head><title></title>")
	+ css + QLatin1String("</head>\n<body>\n");
	return header + s + QStringLiteral("</body></html>");
	}

	class PartModelPrivate
	{
	public:
	PartModelPrivate(PartModel *q_ptr, const std::shared_ptr<MimeTreeParser::ObjectTreeParser> &parser)
	: q(q_ptr)
	, mParser(parser)
	{
	collectContents();
	}

	~PartModelPrivate() = default;

	void checkPart(const MimeTreeParser::MessagePart::Ptr part)
	{
	mMimeTypeCache[part.data()] = part->mimeType();
	// Extract the content of the part and
	mContents.insert(part.data(), extractContent(part.data()));
	}

	// Recursively find encapsulated messages
	void findEncapsulated(const MimeTreeParser::EncapsulatedRfc822MessagePart::Ptr &e)
	{
	mEncapsulatedParts[e.data()] = mParser->collectContentParts(e);
	for (const auto &subPart : std::as_const(mEncapsulatedParts[e.data()])) {
	checkPart(subPart);
	mParents[subPart.data()] = e.data();
	if (auto encapsulatedSub = subPart.dynamicCast<MimeTreeParser::EncapsulatedRfc822MessagePart>()) {
	findEncapsulated(encapsulatedSub);
	}
	}
	}

	QVariant extractContent(MimeTreeParser::MessagePart *messagePart)
	{
	if (auto alternativePart = dynamic_cast<MimeTreeParser::AlternativeMessagePart *>(messagePart)) {
	if (alternativePart->availableModes().contains(MimeTreeParser::AlternativeMessagePart::MultipartIcal)) {
	return alternativePart->icalContent();
	}
	}

	auto preprocessPlaintext = [&](const QString &text) {
	// Reduce consecutive new lines to never exceed 2
	auto cleaned = text;
	cleaned.replace(QRegularExpression(QStringLiteral("[\n\r]{2,}")), QStringLiteral("\n\n"));

	// We always do rich text (so we get highlighted links and stuff).
	const auto html = Qt::convertFromPlainText(cleaned, Qt::WhiteSpaceNormal);
	if (trimMail) {
	const auto result = PartModel::trim(html);
	isTrimmed = result.second;
	Q_EMIT q->trimMailChanged();
	return MimeTreeParser::linkify(result.first);
	}
	return MimeTreeParser::linkify(html);
	};

	if (messagePart->isHtml()) {
	if (dynamic_cast<MimeTreeParser::AlternativeMessagePart *>(messagePart)) {
	containsHtmlAndPlain = true;
	Q_EMIT q->containsHtmlChanged();
	if (!showHtml) {
	return preprocessPlaintext(messagePart->plaintextContent());
	}
	}
	return addCss(mParser->resolveCidLinks(messagePart->htmlContent()));
	}

	if (auto attachmentPart = dynamic_cast<MimeTreeParser::AttachmentMessagePart *>(messagePart)) {
	auto node = attachmentPart->node();
	if (node && mMimeTypeCache[attachmentPart] == "text/calendar") {
	return messagePart->text();
	}
	}

	return preprocessPlaintext(messagePart->text());
	}

	QVariant contentForPart(MimeTreeParser::MessagePart *messagePart) const
	{
	return mContents.value(messagePart);
	}

	void collectContents()
	{
	mEncapsulatedParts.clear();
	mParents.clear();
	mContents.clear();
	containsHtmlAndPlain = false;
	isTrimmed = false;

	const auto parts = mParser->collectContentParts();
	MimeTreeParser::MessagePart::List filteredParts;

	for (const auto &part : parts) {
	const auto contentType = part->node()->contentType();
	if (contentType && contentType->hasParameter(QStringLiteral("protected-headers"))) {
	const auto contentDisposition = part->node()->contentDisposition();
	if (contentDisposition && contentDisposition->disposition() == KMime::Headers::CDinline) {
	continue;
	}
	}
	filteredParts << part;
	}

	for (const auto &part : std::as_const(filteredParts)) {
	checkPart(part);
	if (auto encapsulatedPart = part.dynamicCast<MimeTreeParser::EncapsulatedRfc822MessagePart>()) {
	findEncapsulated(encapsulatedPart);
	}
	}

	for (const auto &part : std::as_const(filteredParts)) {
	if (mMimeTypeCache[part.data()] == "text/calendar") {
	mParts.prepend(part);
	} else {
	mParts.append(part);
	}
	}
	}

	PartModel *q;
	MimeTreeParser::MessagePart::List mParts;
	QHash<MimeTreeParser::MessagePart *, QByteArray> mMimeTypeCache;
	QHash<MimeTreeParser::MessagePart *, MimeTreeParser::MessagePart::List> mEncapsulatedParts;
	QHash<MimeTreeParser::MessagePart , MimeTreeParser::MessagePart > mParents;
	QMap<MimeTreeParser::MessagePart *, QVariant> mContents;
	std::shared_ptr<MimeTreeParser::ObjectTreeParser> mParser;
	bool showHtml{false};
	bool containsHtmlAndPlain{false};
	bool trimMail{false};
	bool isTrimmed{false};
	};

	PartModel::PartModel(std::shared_ptr<MimeTreeParser::ObjectTreeParser> parser)
	: d(std::unique_ptr<PartModelPrivate>(new PartModelPrivate(this, parser)))
	{
	}

	PartModel::~PartModel()
	{
	}

	void PartModel::setShowHtml(bool html)
	{
	if (d->showHtml != html) {
	beginResetModel();
	d->showHtml = html;
	d->collectContents();
	endResetModel();
	Q_EMIT showHtmlChanged();
	}
	}

	bool PartModel::showHtml() const
	{
	return d->showHtml;
	}

	void PartModel::setTrimMail(bool trim)
	{
	if (d->trimMail != trim) {
	beginResetModel();
	d->trimMail = trim;
	d->collectContents();
	endResetModel();
	Q_EMIT trimMailChanged();
	}
	}

	bool PartModel::trimMail() const
	{
	return d->trimMail;
	}

	bool PartModel::isTrimmed() const
	{
	return d->isTrimmed;
	}

	bool PartModel::containsHtml() const
	{
	return d->containsHtmlAndPlain;
	}

	QHash<int, QByteArray> PartModel::roleNames() const
	{
	QHash<int, QByteArray> roles;
	roles[TypeRole] = "type";
	roles[ContentRole] = "content";
	roles[IsEmbeddedRole] = "embedded";
	roles[IsEncryptedRole] = "encrypted";
	roles[IsSignedRole] = "signed";
	roles[SecurityLevelRole] = "securityLevel";
	roles[EncryptionSecurityLevelRole] = "encryptionSecurityLevel";
	roles[SignatureSecurityLevelRole] = "signatureSecurityLevel";
	roles[ErrorType] = "errorType";
	roles[ErrorString] = "errorString";
	roles[IsErrorRole] = "error";
	roles[SenderRole] = "sender";
	roles[SignatureDetails] = "signatureDetails";
	roles[EncryptionDetails] = "encryptionDetails";
	roles[DateRole] = "date";
	return roles;
	}

	QModelIndex PartModel::index(int row, int column, const QModelIndex &parent) const
	{
	if (row < 0 \|\| column != 0) {
	return QModelIndex();
	}
	if (parent.isValid()) {
	const auto part = static_cast<MimeTreeParser::MessagePart *>(parent.internalPointer());
	auto encapsulatedPart = dynamic_cast<MimeTreeParser::EncapsulatedRfc822MessagePart *>(part);

	if (encapsulatedPart) {
	const auto parts = d->mEncapsulatedParts[encapsulatedPart];
	if (row < parts.size()) {
	return createIndex(row, column, parts.at(row).data());
	}
	}
	return QModelIndex();
	}
	if (row < d->mParts.size()) {
	return createIndex(row, column, d->mParts.at(row).data());
	}
	return QModelIndex();
	}

	SignatureInfo encryptionInfo(MimeTreeParser::MessagePart *messagePart)
	{
	SignatureInfo signatureInfo;
	const auto encryptions = messagePart->encryptions();
	if (encryptions.size() > 1) {
	qWarning() << "Can't deal with more than one encryption";
	}
	for (const auto &encryptionPart : encryptions) {
	signatureInfo.keyId = encryptionPart->partMetaData()->keyId;
	signatureInfo.cryptoProto = encryptionPart->cryptoProto();
	signatureInfo.decryptRecipients = encryptionPart->decryptRecipients();
	}
	return signatureInfo;
	};

	SignatureInfo signatureInfo(MimeTreeParser::MessagePart *messagePart)
	{
	SignatureInfo signatureInfo;
	const auto signatures = messagePart->signatures();
	if (signatures.size() > 1) {
	qWarning() << "Can't deal with more than one signature";
	}
	for (const auto &signaturePart : signatures) {
	signatureInfo.keyId = signaturePart->partMetaData()->keyId;
	signatureInfo.cryptoProto = signaturePart->cryptoProto();
	signatureInfo.keyMissing = signaturePart->partMetaData()->sigSummary & GpgME::Signature::KeyMissing;
	signatureInfo.keyExpired = signaturePart->partMetaData()->sigSummary & GpgME::Signature::KeyExpired;
	signatureInfo.keyRevoked = signaturePart->partMetaData()->sigSummary & GpgME::Signature::KeyRevoked;
	signatureInfo.sigExpired = signaturePart->partMetaData()->sigSummary & GpgME::Signature::SigExpired;
	signatureInfo.crlMissing = signaturePart->partMetaData()->sigSummary & GpgME::Signature::CrlMissing;
	signatureInfo.crlTooOld = signaturePart->partMetaData()->sigSummary & GpgME::Signature::CrlTooOld;
	signatureInfo.signer = signaturePart->partMetaData()->signer;
	signatureInfo.isCompliant = signaturePart->partMetaData()->isCompliant;
	signatureInfo.signerMailAddresses = signaturePart->partMetaData()->signerMailAddresses;
	signatureInfo.signatureIsGood = signaturePart->partMetaData()->isGoodSignature;
	signatureInfo.keyTrust = signaturePart->partMetaData()->keyTrust;
	}
	return signatureInfo;
	}

	QVariant PartModel::data(const QModelIndex &index, int role) const
	{
	if (!index.isValid()) {
	return QVariant();
	}

	if (index.internalPointer()) {
	const auto messagePart = static_cast<MimeTreeParser::MessagePart *>(index.internalPointer());
	// qWarning() << "Found message part " << messagePart->metaObject()->className() << messagePart->partMetaData()->status << messagePart->error();
	Q_ASSERT(messagePart);
	switch (role) {
	case Qt::DisplayRole:
	return QStringLiteral("Content%1");
	case SenderRole: {
	if (auto e = dynamic_cast<MimeTreeParser::EncapsulatedRfc822MessagePart *>(messagePart)) {
	return e->from();
	}
	return {};
	}
	case DateRole: {
	if (auto e = dynamic_cast<MimeTreeParser::EncapsulatedRfc822MessagePart *>(messagePart)) {
	return e->date();
	}
	return {};
	}
	case TypeRole: {
	if (messagePart->error()) {
	return QVariant::fromValue(Types::Error);
	}
	if (dynamic_cast<MimeTreeParser::EncapsulatedRfc822MessagePart *>(messagePart)) {
	return QVariant::fromValue(Types::Encapsulated);
	}
	if (auto alternativePart = dynamic_cast<MimeTreeParser::AlternativeMessagePart *>(messagePart)) {
	if (alternativePart->availableModes().contains(MimeTreeParser::AlternativeMessagePart::MultipartIcal)) {
	return QVariant::fromValue(Types::Ical);
	}
	}
	if (auto attachmentPart = dynamic_cast<MimeTreeParser::AttachmentMessagePart *>(messagePart)) {
	auto node = attachmentPart->node();
	if (!node) {
	qWarning() << "no content for attachment";
	return {};
	}
	if (d->mMimeTypeCache[attachmentPart] == "text/calendar") {
	return QVariant::fromValue(Types::Ical);
	}
	}
	if (!d->showHtml && d->containsHtmlAndPlain) {
	return QVariant::fromValue(Types::Plain);
	}
	// For simple html we don't need a browser
	auto complexHtml = [&] {
	if (messagePart->isHtml()) {
	const auto text = messagePart->htmlContent();
	if (text.contains(QStringLiteral("<!DOCTYPE html PUBLIC"))) {
	// We can probably deal with this if it adheres to the strict dtd
	//(that's what our composer produces as well)
	if (!text.contains(QStringLiteral("http://www.w3.org/TR/REC-html40/strict.dtd"))) {
	return true;
	}
	}
	// Blockquotes don't support any styling which would be necessary so they become readable.
	if (text.contains(QStringLiteral("blockquote"))) {
	return true;
	}
	// Media queries are too advanced
	if (text.contains(QStringLiteral("@media"))) {
	return true;
	}
	// auto css properties are not supported e.g margin-left: auto;
	if (text.contains(QStringLiteral(": auto;"))) {
	return true;
	}
	return false;
	} else {
	return false;
	}
	}();
	if (complexHtml) {
	return QVariant::fromValue(Types::Html);
	}
	return QVariant::fromValue(Types::Plain);
	}
	case IsEmbeddedRole:
	return false;
	case IsErrorRole:
	return messagePart->error();
	case ContentRole:
	return d->contentForPart(messagePart);
	case IsEncryptedRole:
	return messagePart->encryptionState() != MimeTreeParser::KMMsgNotEncrypted;
	case IsSignedRole:
	return messagePart->signatureState() != MimeTreeParser::KMMsgNotSigned;
	case SecurityLevelRole: {
	auto signature = messagePart->signatureState();
	auto encryption = messagePart->encryptionState();
	bool messageIsSigned = signature == MimeTreeParser::KMMsgPartiallySigned \|\| signature == MimeTreeParser::KMMsgFullySigned;
	bool messageIsEncrypted = encryption == MimeTreeParser::KMMsgPartiallyEncrypted \|\| encryption == MimeTreeParser::KMMsgFullyEncrypted;

	if (messageIsSigned) {
	const auto sigInfo = signatureInfo(messagePart);
	if (!sigInfo.signatureIsGood) {
	if (sigInfo.keyMissing \|\| sigInfo.keyExpired) {
	return SecurityLevel::NotSoGood;
	}
	return SecurityLevel::Bad;
	}
	}
	// All good
	if ((messageIsSigned \|\| messageIsEncrypted) && !messagePart->error()) {
	return SecurityLevel::Good;
	}
	// No info
	return SecurityLevel::Unknow;
	}
	case EncryptionSecurityLevelRole: {
	auto encryption = messagePart->encryptionState();
	bool messageIsEncrypted = encryption == MimeTreeParser::KMMsgPartiallyEncrypted \|\| encryption == MimeTreeParser::KMMsgFullyEncrypted;
	if (messagePart->error()) {
	return SecurityLevel::Bad;
	}
	// All good
	if (messageIsEncrypted) {
	return SecurityLevel::Good;
	}
	// No info
	return SecurityLevel::Unknow;
	}
	case SignatureSecurityLevelRole: {
	auto signature = messagePart->signatureState();
	bool messageIsSigned = signature == MimeTreeParser::KMMsgPartiallySigned \|\| signature == MimeTreeParser::KMMsgFullySigned;
	if (messageIsSigned) {
	const auto sigInfo = signatureInfo(messagePart);
	if (!sigInfo.signatureIsGood) {
	if (sigInfo.keyMissing \|\| sigInfo.keyExpired) {
	return SecurityLevel::NotSoGood;
	}
	return SecurityLevel::Bad;
	}
	return SecurityLevel::Good;
	}
	// No info
	return SecurityLevel::Unknow;
	}
	case SignatureDetails:
	return QVariant::fromValue(signatureInfo(messagePart));
	case EncryptionDetails:
	return QVariant::fromValue(encryptionInfo(messagePart));
	case ErrorType:
	return messagePart->error();
	case ErrorString: {
	switch (messagePart->error()) {
	case MimeTreeParser::MessagePart::NoKeyError: {
	if (auto encryptedMessagePart = dynamic_cast<MimeTreeParser::EncryptedMessagePart *>(messagePart)) {
	if (encryptedMessagePart->isNoSecKey()) {
	QString errorMessage = i18ndc("mimetreeparser",
	"@info:status",
	- "No secret key found to decrypt the message. The message is encrypted for the following keys:")
	- + QStringLiteral("<ul>");
	- const auto recipients = encryptedMessagePart->decryptRecipients();
	- for (const auto &recipientIt : recipients) {
	- auto recipient = recipientIt.first;
	- auto key = recipientIt.second;
	- if (key.keyID()) {
	- const auto link = QStringLiteral("messageviewer:showCertificate#%1 ### %2 ### %3")
	- .arg(encryptedMessagePart->cryptoProto()->displayName(),
	- encryptedMessagePart->cryptoProto()->name(),
	- QString::fromLatin1(key.keyID()));
	- errorMessage += QStringLiteral("<li>%1 (<a href=\"%2\")Ox%3</a>)</li>")
	- .arg(QString::fromLatin1(key.userID(0).id()), link, QString::fromLatin1(key.keyID()));
	- } else {
	- const auto link = QStringLiteral("messageviewer:showCertificate#%1 ### %2 ### %3")
	- .arg(encryptedMessagePart->cryptoProto()->displayName(),
	- encryptedMessagePart->cryptoProto()->name(),
	- QString::fromLatin1(recipient.keyID()));
	- errorMessage += QStringLiteral("<li>%1 (<a href=\"%2\">0x%3</a>)</li>")
	- .arg(i18nc("@info", "Unknow Key"), link, QString::fromLatin1(recipient.keyID()));
	- }
	- }
	+ "No secret key found to decrypt the message. The message is encrypted for the following keys:");
	+ errorMessage += MimeTreeParser::decryptRecipientsToHtml(encryptedMessagePart->decryptRecipients(), encryptedMessagePart->cryptoProto());
	return errorMessage;
	}
	}
	}

	return messagePart->errorString();

	case MimeTreeParser::MessagePart::PassphraseError:
	return i18ndc("mimetreeparser", "@info:status", "Wrong passphrase.");
	case MimeTreeParser::MessagePart::UnknownError:
	break;
	default:
	break;
	}
	return messagePart->errorString();
	}
	}
	}
	return QVariant();
	}

	QModelIndex PartModel::parent(const QModelIndex &index) const
	{
	if (index.isValid()) {
	if (auto indexPart = static_cast<MimeTreeParser::MessagePart *>(index.internalPointer())) {
	for (const auto &part : std::as_const(d->mParts)) {
	if (part.data() == indexPart) {
	return QModelIndex();
	}
	}
	const auto parentPart = d->mParents[indexPart];
	Q_ASSERT(parentPart);
	int row = 0;
	const auto parts = d->mEncapsulatedParts[parentPart];
	for (const auto &part : parts) {
	if (part.data() == indexPart) {
	break;
	}
	row++;
	}
	return createIndex(row, 0, parentPart);
	}
	return {};
	}
	return {};
	}

	int PartModel::rowCount(const QModelIndex &parent) const
	{
	if (parent.isValid()) {
	const auto part = static_cast<MimeTreeParser::MessagePart *>(parent.internalPointer());
	auto encapsulatedPart = dynamic_cast<MimeTreeParser::EncapsulatedRfc822MessagePart *>(part);

	if (encapsulatedPart) {
	const auto parts = d->mEncapsulatedParts[encapsulatedPart];
	return parts.size();
	}
	return 0;
	}
	return d->mParts.count();
	}

	int PartModel::columnCount(const QModelIndex &) const
	{
	return 1;
	}
	diff --git a/src/core/utils.cpp b/src/core/utils.cpp
	index 6bf79a4..ba77020 100644
	--- a/src/core/utils.cpp
	+++ b/src/core/utils.cpp
	@@ -1,17 +1,41 @@
	// SPDX-FileCopyrightText: 2016 Sandro Knauß <sknauss@kde.org>
	// SPDX-License-Identifier: LGPL-2.0-or-later

	#include "utils.h"

	+#include <KLocalizedString>
	+
	using namespace MimeTreeParser;

	KMime::Content MimeTreeParser::findTypeInDirectChildren(KMime::Content content, const QByteArray &mimeType)
	{
	const auto contents = content->contents();
	for (const auto child : contents) {
	if ((!child->contentType()->isEmpty()) && (mimeType == child->contentType()->mimeType())) {
	return child;
	}
	}
	return nullptr;
	}
	+
	+QString MimeTreeParser::decryptRecipientsToHtml(const std::vector<std::pair<GpgME::DecryptionResult::Recipient, GpgME::Key>> &recipients,
	+ const QGpgME::Protocol *cryptoProto)
	+{
	+ QString text = QStringLiteral("<ul>");
	+ for (const auto &recipientIt : recipients) {
	+ const auto recipient = recipientIt.first;
	+ const auto key = recipientIt.second;
	+ if (key.keyID()) {
	+ const auto link = QStringLiteral("messageviewer:showCertificate#%1 ### %2 ### %3")
	+ .arg(cryptoProto->displayName(), cryptoProto->name(), QString::fromLatin1(key.keyID()));
	+ text +=
	+ QStringLiteral("<li>%1 (<a href=\"%2\")Ox%3</a>)</li>").arg(QString::fromLatin1(key.userID(0).id()), link, QString::fromLatin1(key.keyID()));
	+ } else {
	+ const auto link = QStringLiteral("messageviewer:showCertificate#%1 ### %2 ### %3")
	+ .arg(cryptoProto->displayName(), cryptoProto->name(), QString::fromLatin1(recipient.keyID()));
	+ text += QStringLiteral("<li>%1 (<a href=\"%2\">0x%3</a>)</li>").arg(i18nc("@info", "Unknow Key"), link, QString::fromLatin1(recipient.keyID()));
	+ }
	+ }
	+ text += QStringLiteral("</ul>");
	+ return text;
	+}
	diff --git a/src/core/utils.h b/src/core/utils.h
	index 6b55db9..2de6053 100644
	--- a/src/core/utils.h
	+++ b/src/core/utils.h
	@@ -1,11 +1,23 @@
	// SPDX-FileCopyrightText: 2016 Sandro Knauß <sknauss@kde.org>
	// SPDX-License-Identifier: LGPL-2.0-or-later

	#pragma once

	#include <KMime/Content>

	+#include <QGpgME/Protocol>
	+#include <gpgme++/decryptionresult.h>
	+#include <gpgme++/key.h>
	+
	+#include <vector>
	+
	+#include "mimetreeparser_core_export.h"
	+
	namespace MimeTreeParser
	{
	KMime::Content findTypeInDirectChildren(KMime::Content content, const QByteArray &mimeType);
	+
	+/// Convert a list of recipients to an html list
	+MIMETREEPARSER_CORE_EXPORT QString decryptRecipientsToHtml(const std::vector<std::pair<GpgME::DecryptionResult::Recipient, GpgME::Key>> &recipients,
	+ const QGpgME::Protocol *cryptoProto);
	}
	diff --git a/src/widgets/messagecontainerwidget.cpp b/src/widgets/messagecontainerwidget.cpp
	index 87b50f8..2e2afbe 100644
	--- a/src/widgets/messagecontainerwidget.cpp
	+++ b/src/widgets/messagecontainerwidget.cpp
	@@ -1,265 +1,247 @@
	// SPDX-FileCopyrightText: 2023 g10 Code GmbH
	// SPDX-FileContributor: Carl Schwan <carl.schwan@gnupg.com>
	// SPDX-License-Identifier: LGPL-2.0-or-later

	+#include "../core/utils.h"
	#include "messagecontainerwidget_p.h"
	#include "urlhandler_p.h"

	#include <KLocalizedString>
	#include <KMessageWidget>
	#include <Libkleo/Compliance>
	#include <QGpgME/Protocol>

	#include <QDebug>
	#include <QLabel>
	#include <QPaintEvent>
	#include <QPainter>
	#include <QResizeEvent>
	#include <QVBoxLayout>

	namespace
	{

	const int borderWidth = 5;

	QColor getColor(PartModel::SecurityLevel securityLevel)
	{
	const static QHash<PartModel::SecurityLevel, QColor> colors{
	{PartModel::Good, QColor(39, 174, 96)}, // Window: ForegroundPositive
	{PartModel::Bad, QColor(218, 68, 83)}, // Window: ForegroundNegative
	{PartModel::NotSoGood, QColor(246, 116, 0)}, // Window: ForegroundNeutral
	};

	return colors.value(securityLevel, QColor());
	}

	KMessageWidget::MessageType getType(PartModel::SecurityLevel securityLevel)
	{
	const static QHash<PartModel::SecurityLevel, KMessageWidget::MessageType> messageTypes{
	{PartModel::Good, KMessageWidget::MessageType::Positive},
	{PartModel::Bad, KMessageWidget::MessageType::Error},
	{PartModel::NotSoGood, KMessageWidget::MessageType::Warning},
	};

	return messageTypes.value(securityLevel, KMessageWidget::MessageType::Information);
	}

	QString getDetails(const SignatureInfo &signatureDetails)
	{
	QString href;
	if (signatureDetails.cryptoProto) {
	href = QStringLiteral("messageviewer:showCertificate#%1 ### %2 ### %3")
	.arg(signatureDetails.cryptoProto->displayName(), signatureDetails.cryptoProto->name(), QString::fromLatin1(signatureDetails.keyId));
	}

	QString details;
	if (signatureDetails.keyMissing) {
	if (Kleo::DeVSCompliance::isCompliant() && signatureDetails.isCompliant) {
	details += i18ndc("mimetreeparser",
	"@label",
	"This message has been signed VS-NfD compliant using the key <a href=\"%1\">%2</a>.",
	href,
	QString::fromUtf8(signatureDetails.keyId))
	+ QLatin1Char('\n');
	} else {
	details += i18ndc("mimetreeparser",
	"@label",
	"This message has been signed using the key <a href=\"%1\">%2</a>.",
	href,
	QString::fromUtf8(signatureDetails.keyId))
	+ QLatin1Char('\n');
	}
	details += i18ndc("mimetreeparser", "@label", "The key details are not available.");
	} else {
	if (Kleo::DeVSCompliance::isCompliant() && signatureDetails.isCompliant) {
	details += i18ndc("mimetreeparser", "@label", "This message has been signed VS-NfD compliant by %1.", signatureDetails.signer.toHtmlEscaped());
	} else {
	details += i18ndc("mimetreeparser", "@label", "This message has been signed by %1.", signatureDetails.signer.toHtmlEscaped());
	}
	if (signatureDetails.keyRevoked) {
	details += QLatin1Char('\n') + i18ndc("mimetreeparser", "@label", "The <a href=\"%1\">key</a> was revoked.", href);
	}
	if (signatureDetails.keyExpired) {
	details += QLatin1Char('\n') + i18ndc("mimetreeparser", "@label", "The <a href=\"%1\">key</a> was expired.", href);
	}

	if (signatureDetails.keyTrust == GpgME::Signature::Unknown) {
	details +=
	QLatin1Char(' ') + i18ndc("mimetreeparser", "@label", "The signature is valid, but the <a href=\"%1\">key</a>'s validity is unknown.", href);
	} else if (signatureDetails.keyTrust == GpgME::Signature::Marginal) {
	details +=
	QLatin1Char(' ') + i18ndc("mimetreeparser", "@label", "The signature is valid and the <a href=\"%1\">key</a> is marginally trusted.", href);
	} else if (signatureDetails.keyTrust == GpgME::Signature::Full) {
	details += QLatin1Char(' ') + i18ndc("mimetreeparser", "@label", "The signature is valid and the <a href=\"%1\">key</a> is fully trusted.", href);
	} else if (signatureDetails.keyTrust == GpgME::Signature::Ultimate) {
	details +=
	QLatin1Char(' ') + i18ndc("mimetreeparser", "@label", "The signature is valid and the <a href=\"%1\">key</a> is ultimately trusted.", href);
	} else {
	details += QLatin1Char(' ') + i18ndc("mimetreeparser", "@label", "The signature is valid, but the <a href=\"%1\">key</a> is untrusted.", href);
	}
	if (!signatureDetails.signatureIsGood && !signatureDetails.keyRevoked && !signatureDetails.keyExpired
	&& signatureDetails.keyTrust != GpgME::Signature::Unknown) {
	details += QLatin1Char(' ') + i18ndc("mimetreeparser", "@label", "The signature is invalid.");
	}
	}
	return details;
	}

	}

	MessageWidgetContainer::MessageWidgetContainer(bool isSigned,
	const SignatureInfo &signatureInfo,
	PartModel::SecurityLevel signatureSecurityLevel,
	bool displaySignatureInfo,
	bool isEncrypted,
	const SignatureInfo &encryptionInfo,
	PartModel::SecurityLevel encryptionSecurityLevel,
	bool displayEncryptionInfo,
	UrlHandler *urlHandler,
	QWidget *parent)
	: QFrame(parent)
	, m_isSigned(isSigned)
	, m_signatureInfo(signatureInfo)
	, m_signatureSecurityLevel(signatureSecurityLevel)
	, m_displaySignatureInfo(displaySignatureInfo)
	, m_isEncrypted(isEncrypted)
	, m_encryptionInfo(encryptionInfo)
	, m_encryptionSecurityLevel(encryptionSecurityLevel)
	, m_displayEncryptionInfo(displayEncryptionInfo)
	, m_urlHandler(urlHandler)
	{
	createLayout();
	}

	MessageWidgetContainer::~MessageWidgetContainer() = default;

	void MessageWidgetContainer::paintEvent(QPaintEvent *event)
	{
	Q_UNUSED(event)

	if (!m_isSigned && !m_isEncrypted) {
	return;
	}

	QPainter painter(this);
	if (layoutDirection() == Qt::RightToLeft) {
	auto r = rect();
	r.setX(width() - borderWidth);
	r.setWidth(borderWidth);
	const QColor color = getColor(PartModel::SecurityLevel::Good);
	painter.setRenderHint(QPainter::Antialiasing);
	painter.setBrush(QColor(color));
	painter.setPen(QPen(Qt::NoPen));
	painter.drawRect(r);
	} else {
	auto r = rect();
	r.setWidth(borderWidth);
	const QColor color = getColor(PartModel::SecurityLevel::Good);
	painter.setRenderHint(QPainter::Antialiasing);
	painter.setBrush(QColor(color));
	painter.setPen(QPen(Qt::NoPen));
	painter.drawRect(r);
	}
	}

	bool MessageWidgetContainer::event(QEvent *event)
	{
	if (event->type() == QEvent::Polish && !layout()) {
	createLayout();
	}

	return QFrame::event(event);
	}

	void MessageWidgetContainer::createLayout()
	{
	delete layout();

	auto vLayout = new QVBoxLayout(this);

	if (m_isSigned \|\| m_isEncrypted) {
	if (layoutDirection() == Qt::RightToLeft) {
	layout()->setContentsMargins(0, 0, borderWidth * 2, 0);
	} else {
	layout()->setContentsMargins(borderWidth * 2, 0, 0, 0);
	}
	}

	if (m_isEncrypted && m_displayEncryptionInfo) {
	auto encryptionMessage = new KMessageWidget(this);
	encryptionMessage->setObjectName(QStringLiteral("EncryptionMessage"));
	encryptionMessage->setCloseButtonVisible(false);
	encryptionMessage->setIcon(QIcon::fromTheme(QStringLiteral("mail-encrypted")));

	QString text;
	if (m_encryptionInfo.keyId.isEmpty()) {
	encryptionMessage->setMessageType(KMessageWidget::Error);
	if (Kleo::DeVSCompliance::isCompliant() && m_encryptionInfo.isCompliant) {
	text = i18n("This message is VS-NfD compliant encrypted but we don't have the key for it.", QString::fromUtf8(m_encryptionInfo.keyId));
	} else {
	text = i18n("This message is encrypted but we don't have the key for it.");
	}
	} else {
	encryptionMessage->setMessageType(KMessageWidget::Positive);
	if (Kleo::DeVSCompliance::isCompliant() && m_encryptionInfo.isCompliant) {
	text = i18n("This message is VS-NfD compliant encrypted.");
	} else {
	text = i18n("This message is encrypted.");
	}
	}

	encryptionMessage->setText(text + QLatin1Char(' ') + QStringLiteral("<a href=\"messageviewer:showDetails\">Details</a>"));

	connect(encryptionMessage, &KMessageWidget::linkActivated, this, [this, encryptionMessage, text](const QString &link) {
	QUrl url(link);
	if (url.path() == QStringLiteral("showDetails")) {
	- QString newText = text + QStringLiteral(" ") + i18n("The message is encrypted for the following keys:") + QStringLiteral("<ul>");
	-
	- for (const auto &recipient : m_encryptionInfo.decryptRecipients) {
	- if (recipient.second.keyID()) {
	- const auto href = QStringLiteral("messageviewer:showCertificate#%1 ### %2 ### %3")
	- .arg(m_encryptionInfo.cryptoProto->displayName(),
	- m_encryptionInfo.cryptoProto->name(),
	- QString::fromLatin1(recipient.second.keyID()));
	-
	- newText += QStringLiteral("<li><a href=\"%1\">0x%2</a></li>").arg(href, QString::fromLatin1(recipient.second.keyID()));
	- } else {
	- const auto href = QStringLiteral("messageviewer:showCertificate#%1 ### %2 ### %3")
	- .arg(m_encryptionInfo.cryptoProto->displayName(),
	- m_encryptionInfo.cryptoProto->name(),
	- QString::fromLatin1(recipient.first.keyID()));
	-
	- newText +=
	- QStringLiteral("<li><a href=\"%1\">0x%2</a> (%3)</li>").arg(href, QString::fromLatin1(recipient.first.keyID()), i18n("Unknown key"));
	- }
	- }
	-
	- newText += QStringLiteral("</ul>");
	+ QString newText = text + QLatin1Char(' ') + i18n("The message is encrypted for the following keys:");
	+
	+ newText += MimeTreeParser::decryptRecipientsToHtml(m_encryptionInfo.decryptRecipients, m_encryptionInfo.cryptoProto);

	encryptionMessage->setText(newText);
	return;
	}

	if (url.path() == QStringLiteral("showCertificate")) {
	m_urlHandler->handleClick(QUrl(link), window()->windowHandle());
	}
	});

	vLayout->addWidget(encryptionMessage);
	}

	if (m_isSigned && m_displaySignatureInfo) {
	auto signatureMessage = new KMessageWidget(this);
	signatureMessage->setObjectName(QStringLiteral("SignatureMessage"));
	signatureMessage->setIcon(QIcon::fromTheme(QStringLiteral("mail-signed")));
	signatureMessage->setCloseButtonVisible(false);
	signatureMessage->setText(getDetails(m_signatureInfo));
	connect(signatureMessage, &KMessageWidget::linkActivated, this, [this](const QString &link) {
	m_urlHandler->handleClick(QUrl(link), window()->windowHandle());
	});
	signatureMessage->setMessageType(getType(m_signatureSecurityLevel));
	signatureMessage->setWordWrap(true);

	vLayout->addWidget(signatureMessage);
	}
	}

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