That looks like a problem with our outgoing SMTP configuration (postfix software).

You're getting a 553 error (relaying not allowed), and the reason message suggests that this is because you are not "logged in"; i.e. not authenticated with your relaying server "mx02.kolabsys.com".

Not a Roundcube issue.

On 19.11.2013 07:00, Simon Loewenthal wrote:

 

Looks like this does not work!

Nov 19 15:02:18 lt postfix/smtp[22046]: BB1A395: to=<users@lists.roundcube.net>, relay=ext-mx02.kolabsys.com[94.230.208.222]:25, delay=0.16, delays=0.06/0.01/0.07/0.02, dsn=5.7.1, status=bounced (host ext-mx02.kolabsys.com[94.230.208.222] said: 553 5.7.1 <users@lists.roundcube.net>: Sender address rejected: not logged in (in reply to RCPT TO command))

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