Hello, I have on my server the latest version of Mailcow.
We have noticed that when replying to an email or sending an email that has images attached and we add attachments, the email is received without the attachments.
This happens from ThunderBird and Outlook (2021 or 2024). From Sogo I have not seen this problem occur.
As a solution we changed the signature from an image to an html signature, but the problem comes if we reply to another email that has images attached.
If we do the test of sending an email with attachments, and this email has images, they do not receive the attachments. If we send the same email deleting the images and attaching the files, they do receive them.
I would appreciate any help. In the Rspamd log the only difference I see is that in the correct one (Sogo) : Symbols
MID_RHS_NOT_FQDN (0.5)
MAILCOW_AUTH (-20)
And Thunderbird:
MIME_HTML_ONLY (0.2)
MAILCOW_AUTH (-20)