I'm running the Edgy server with ISPConfig setup. And I have two questions, For some reason my mailserver is no longer sending mail out. I have always used my ISP as a relay host since they block port 25 for outgoing mail. I sent a mail to my work 2 hours ago and it still did not arrive, this is very unusual since it usually is instant. I have also found out that several other mails I send never get there. From the logs it looks like the mail was handled and accepted by the Relay host. Code: Dec 1 22:07:40 lnx1 postfix/smtpd: 5C118940E3: client=unknown[192.168.1.3], sasl_method=PLAIN, sasl_username=web1_**Removed** Dec 1 22:07:40 lnx1 postfix/cleanup: 5C118940E3: message-id=<200612012207.04229.*****@**removed**> Dec 1 22:07:40 lnx1 postfix/qmgr: 5C118940E3: from=<**my mail**>, size=931, nrcpt=1 (queue active) Dec 1 22:07:40 lnx1 postfix/smtpd: disconnect from unknown[192.168.1.3] Dec 1 22:07:41 lnx1 postfix/smtp: 5C118940E3: to=<[email protected] smtp.orange.nl is my Relay host. I have on purpose removed my username and e-mails. It might be related to my second question: Am I an open relay with the standard setup, and becasue of that perhaps the relay host is blackholing my messages? Reason why I'm asking is something I saw in /var/logs/mail.log while looking for the first problem. Code: Dec 1 22:12:28 lnx1 postfix/qmgr: 4DBF194102: from=<[email protected][email protected][email protected][email protected][email protected][email protected] I suspect it is spam getting rejected by my relay host, since the recipiant, is a user on my server that has all her mail forwarded to an external account. But in any case how can I troubleshoot the first problem to see why my mail is not getting through.