This is again related to the same header problem that's being experienced by some in gmail, and qmail-scanner.

All mail headers should only be terminated by a \n, not a \r\n.

See post: http://lists.dorkzilla.org/archive/roundcube-dev/2005Nov/0889.html

This change should probably be added to CVS for all to use.

--
Dave Wood

On 16/11/05, Thomas -Balu- Walter <list+roundcube-dev@b-a-l-u.de> wrote:
Hello all,

my local amavisd-new reports a problem with the header of mails sent by
roundcube:

X-Amavis-Alert: BAD HEADER Improper use of control character (char 0D hex) in message header 'MIME-Version'
        MIME-Version: 1.0\r\n ^

It's late and I'm tired, so I didn't check yet, what might cause this..

     Balu