Hello,
we have just put into production the latest version of Roundcube (v0.5) as our university's webmail service (for around 30,000 users available at http://webmail.ntua.gr/) and we are very satisfied with it.
Currently, we have a small problem that is like the one described in ticket #1486712 (http://trac.roundcube.net/ticket/1486712). Our mail servers are using Cyrus (v2.3.16) and this is how we get the "could not save message in Sent" error:
simple as a "hello world" message.
The message is accepted by cyrus and stored into the user's mailbox.
When trying to forward that message from within roundcube, cyrus
reports "NO Message contains bare newlines" and roundcude reports "could not save message in Sent".
We tried changing the mail_header_delimiter option but I don't thing it makes any difference.
As a way to get around the bug we are using the attached dirty patch.
Regards, Panagiotis