Reindl Harald h.reindl@thelounge.net wrote:

...

[25-Dec-2013 20:06:38 +0100]: Recv: 220 mail.anup.de [25-Dec-2013 20:06:38 +0100]: Send: EHLO www.anup.de [25-Dec-2013 20:06:38 +0100]: Recv: 250-mail.anup.de [25-Dec-2013 20:06:38 +0100]: Recv: 250-PIPELINING [25-Dec-2013 20:06:38 +0100]: Recv: 250-SIZE 20971520 [25-Dec-2013 20:06:38 +0100]: Recv: 250-STARTTLS [25-Dec-2013 20:06:38 +0100]: Recv: 250-ENHANCEDSTATUSCODES [25-Dec-2013 20:06:38 +0100]: Recv: 250-8BITMIME [25-Dec-2013 20:06:38 +0100]: Recv: 250 DSN [25-Dec-2013 20:06:38 +0100]: Send: RSET [25-Dec-2013 20:06:38 +0100]: Recv: 250 2.0.0 Ok [25-Dec-2013 20:06:38 +0100]: Send: QUIT [25-Dec-2013 20:06:38 +0100]: Recv: 221 2.0.0 Bye

Could it be %u only submits the username without the domainpart?

no - you SMTPD does *not* announce authentication or you have disabled unencrypted authentication in which case "$rcmail_config['smtp_server'] = '78.47.3.18';" is just wrong and should be tls://78.47.3.18

tls://78.47.3.18 did the trick. The users must use TLS to authenticate.

please realize that this is *not* a roundcube issue in no way it is a roundcube issue, you need to properly configure your mailserver or ask on the mailservers list how to do so

[harry@srv-rhsoft:~]$ telnet mail.anup.de 25 Trying 78.47.3.18... Connected to mail.anup.de. Escape character is '^]'. 220 mail.anup.de EHLO test 250-mail.anup.de 250-PIPELINING 250-SIZE 20971520 250-STARTTLS 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN

I don't know why the mailserver does not announce AUTH mechanisms for now. I'll ask at the postfix list.

Let me thank you for your patience and for solving this problem! One step more understanding this piece of software.

Andreas