Hi Timo, Am 28.01.2016 um 15:27 schrieb Timo Schoeler: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > smtp inet n - n - - smtpd -v <= !!! > #smtp inet n - n - 1 postscreen > #smtpd pass - - n - - smtpd > > smtpd -v instead of smtpd -- that will hopefully give some more insight. Did that and I think I have a candidate: # grep B8678C1DD078 /var/log/maillog Jan 28 15:35:11 x postfix/smtpd[17752]: input attribute value: B8678C1DD078 Jan 28 15:35:11 x postfix/smtpd[17752]: B8678C1DD078: client=x, sasl_method=LOGIN, sasl_username=x Jan 28 15:35:11 x postfix/cleanup[17755]: B8678C1DD078: message-id=<1535444742.91269.1453991711730.JavaMail.tomcat at x> Jan 28 15:35:11 x postfix/smtpd[17752]: > x: 250 2.0.0 Ok: queued as B8678C1DD078 Jan 28 15:35:11 x postfix/qmgr[17622]: B8678C1DD078: from=<x>, size=20507, nrcpt=1 (queue active) And another one working with the same destination domain: # grep 9DD4AC1DD078 /var/log/maillog Jan 28 15:35:11 x postfix/smtpd[17752]: input attribute value: 9DD4AC1DD078 Jan 28 15:35:11 x postfix/smtpd[17752]: 9DD4AC1DD078: client=x, sasl_method=LOGIN, sasl_username=x Jan 28 15:35:11 x postfix/cleanup[17755]: 9DD4AC1DD078: message-id=<995903891.91260.1453991711622.JavaMail.tomcat at x> Jan 28 15:35:11 x postfix/qmgr[17622]: 9DD4AC1DD078: from=<x>, size=3099, nrcpt=1 (queue active) Jan 28 15:35:11 x postfix/smtpd[17752]: > x: 250 2.0.0 Ok: queued as 9DD4AC1DD078 Jan 28 15:35:11 x postfix/smtp[17756]: 9DD4AC1DD078: to=<x>, relay=x:25, delay=0.11, delays=0.02/0/0.04/0.05, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as AE7B241052) Jan 28 15:35:11 x postfix/qmgr[17622]: 9DD4AC1DD078: removed In the broken one there is a qmgr missing and smtp is not sending out. Any ideas? Thx