related to: https://dev.gnupg.org/T7722

Saving encrypted mails with attachments that have long names has several issues.

Given a freshly encrypted draft with three attachments for each issue:

• test.pdf
• long.name.with.dot.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.12.odt
• long-name-without-dot-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789.odt

Issue of renaming

1. Create Draft with attachments described above
2. Preview Draft
   
3. Select another Draft
4. Select Draft again => Attachments with long names are renamed to attachment.odt (also happens on open/close/open)
   

gpgol.log

Issue of deletion
Currently not reproducible reliable, but sometimes on deletion of a "attachment.odt" outlook tells me, that the attachment is part of the encrypted message and cannot be deleted (deletion happens though):

Issue of sending

1. Create Draft with attachments described above
2. Open Draft in it's own window (long names still displayed)
3. Add a recipient/subject and send => Error: attachment "attachment.odt" is an outlook item (see details in image)
   

gpgol.log

Also happens on a second draft save:

1. Create Draft with attachments described above
2. Save
3. Add To, Subject, Body
4. Save => Error: attachment "long.name[...]" is an outlook item (see details in image)

gpgol.log

Issue of unsaved changes on closing Outlook

To reproduce:

1. Create Draft with attachments described above
2. Preview Draft
3. Select another Draft
4. Select Draft again => Attachments with long names are renamed to attachment.odt
5. Select another Draft again
6. Close Outlook => "Want to save your changes?" (Note: Cancel also closes Outlook)
   

gpgol.log