When an email message has attachments marked as "inline", but not
included in HTML body, Roundcube shows the attachment in the list of
messages, but when viewing the message, no attachments are shown.

In that case attachments are rendered "invisible": we know (from the
message list) that the messages has attachments, but there is way to
see or download them.

This is because RoundCube falsely considers inline attachments to be
included in the HTML e-mail, but it's not always the case.

See attached screenshot.

I am suggesting using the attached patch to solve the issue, by always
allowing to open and save inline files, as is the case with other email
software like Zimbra, Claws Mail, GMail and Mutt.

I am suggesting this patch here as upstream doesn't want to fix
this longstanding issue:
https://github.com/roundcube/roundcubemail/pull/9150

Thank you.

Control: reassign -1 roundcube-core 1.6.6+dfsg-1
Control: forwarded -1 https://github.com/roundcube/roundcubemail/issues/5051
Control: tag -1 upstream

Upstream has given a rationale for not accepting that PR, but that
doesn't mean they're not interested in fixing the issue in the first
place (I note that issue 5051 is still open).

Not keen to maintain such a patch though in Debian, but leaving this bug
open to track its status upstream (via forwarded URL).

Thank you, from previous discussion it was my understanding that
upstream didn't want to fix this issue, I asked again, just to be
sure.

This issue comes back biting us every single month, it's very annoying to users.