Reported in T3419:
You write a message with Outlook 2016 on Exchange Server and GpgOL 2.0.4-beta15, the body contains eg. "I don't like you!!". You close composing this mail, it'll be in the "Draft"-Folder You continue writing your mail from "Draft" and change the body to "I like you!" You encrypt(/sign&encrypt) your mail with the the body to "I like you!" You send this mail, in your "Sent Items"-Folder you'll find your encrypted(/signed&encrypted) mail with the body to "I like you!" The recipient on Outlook 2016/Exchange Server with GPG4Win 2.3.2 & GPGol 1.4.0 will receive your encrypted(/signed&encrypted) mail, but the mail body will contain "I don't like you!!"
I can reproduce this even without Exchange. Inspection of the sent mail shows that the problem is the multipart/alternative plaintext vs. html.
The HTML Part contains the correct body -> GpgOL 2.x / Gpg4win 3.x will show the HTML part if it is not explicitly configured in outlook to prefer plaintext
The text/plain part contains the wrong body -> GpgOL 2.x will show that part.
The mime structure looks like:
MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pgp-signature"; micalg=pgp-sha1 ; boundary="=-=+vE40ul+jXH+wK=-=" --=-=+vE40ul+jXH+wK=-= Content-Type: multipart/alternative; boundary="=-=c1wa7mr/OtfLrP=-=" --=-=c1wa7mr/OtfLrP=-= Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hello wrong body --=-=c1wa7mr/OtfLrP=-= Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:= //www.w3.org/TR/REC-html40"><head><meta name=3DGenerator content=3D"Microso= ft Word 15 (filtered medium)"><style><!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; font-size:11.0pt; font-family:"Calibri",sans-serif; mso-fareast-language:EN-US;} a:link, span.MsoHyperlink {mso-style-priority:99; color:#0563C1; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:#954F72; text-decoration:underline;} p.msonormal0, li.msonormal0, div.msonormal0 {mso-style-name:msonormal; mso-margin-top-alt:auto; margin-right:0cm; mso-margin-bottom-alt:auto; margin-left:0cm; font-size:11.0pt; font-family:"Calibri",sans-serif;} span.E-MailFormatvorlage18 {mso-style-type:personal-compose; font-family:"Calibri",sans-serif; color:windowtext;} .MsoChpDefault {mso-style-type:export-only; font-size:10.0pt; font-family:"Calibri",sans-serif; mso-fareast-language:EN-US;} @page WordSection1 {size:612.0pt 792.0pt; margin:72.0pt 72.0pt 72.0pt 72.0pt;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--></head><body lang=3DDE link=3D"#0563C1" v= link=3D"#954F72"><div class=3DWordSection1><p class=3DMsoNormal>Hello right= body<o:p></o:p></p></div></body></html> --=-=c1wa7mr/OtfLrP=-=-- --=-=+vE40ul+jXH+wK=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEE60xaW3rWyFJ/BQuvHtTwvGz7yRIFAlovdRUACgkQHtTwvGz7 yRIoFgf/ZL7Sc/XlTyVtv+k9qybyWdzThQDl/HFky+lJaOCV23CO3Ke34WnapYIY 6KSBb1S05t7XyFkelhTYKkYWjaFcfE0+6+L5e/yT2i0k6J+XBP1Ei8eWqMwjJuKs W0rFGyXOLBBwGrj/4/I86veS1cW5VBfUVmBlaoWosXugERAi3isKth1jaQO9D7X9 i32d+hjXJ6KntbJOD4clGtJ0L1n5w9SKsldfRQLxvdKkgqRWnEeZhUGlMt1YgUga JCpFQ4Du1JuMRQegS1gZC/HBcDLuvoBH6B/zO797IHxMQiH1LbDjqfeqp/nmEHdN 94jsBonuc0MVRNvFewGcp6YB0K8hMw== =5m/0 -----END PGP SIGNATURE----- --=-=+vE40ul+jXH+wK=-=--