Hier meine Logs:
partner...
May 16 12:25:21 relay01 postfix/smtpd[30825]: connect from unknown[192.168.xxx.yyy]
May 16 12:25:21 relay01 postfix/smtpd[30825]: 26F6E594E: client=unknown[192.168.xxx.yyy]
May 16 12:25:21 relay01 postfix/cleanup[31523]: 26F6E594E: message-id=<kcim.591aefb1.31f.782c006561c3e456@mail01.<domain>.de>
May 16 12:25:21 relay01 postfix/qmgr[26408]: 26F6E594E: from=<<local>@<domain>.de>, size=3202, nrcpt=1 (queue active)
May 16 12:25:21 relay01 postfix/smtpd[30825]: disconnect from unknown[192.168.xxx.yyy]
May 16 12:25:21 relay01 postfix/smtp[31524]: warning: numeric domain name in resource data of MX record for <targetdomain>.de: <ip>
May 16 12:25:21 relay01 postfix/smtp[31524]: 26F6E594E: to=<<targetaddress>@<targetdomain>.de>, relay=<ip>[<ip>]:25, delay=0.24, delays=0.03/0.02/0.12/0.07, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 50565411B6)
May 16 12:25:21 relay01 postfix/qmgr[26408]: 26F6E594E: removed
social...
May 16 12:25:37 relay01 postfix/smtpd[30825]: connect from unknown[192.168.xxx.yyy]
May 16 12:25:37 relay01 postfix/smtpd[30825]: C1BD9594E: client=unknown[192.168.xxx.yyy]
May 16 12:25:37 relay01 postfix/cleanup[31523]: C1BD9594E: message-id=<kcim.591aefc1.351.1f62807e0f571b2e@mail01.<domain>.de>
May 16 12:25:37 relay01 postfix/qmgr[26408]: C1BD9594E: from=<<local>@<domain>.de>, size=3253, nrcpt=1 (queue active)
May 16 12:25:37 relay01 postfix/smtpd[30825]: disconnect from unknown[192.168.xxx.yyy]
May 16 12:25:37 relay01 postfix/smtp[31524]: warning: numeric domain name in resource data of MX record for <targetdomain>.de: <ip>
May 16 12:25:38 relay01 postfix/smtp[31524]: C1BD9594E: to=<<target2>@<targetdomain>.de>, relay=<ip>[<ip>]:25, delay=0.23, delays=0.02/0/0.16/0.05, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as EC107411B6)
May 16 12:25:38 relay01 postfix/qmgr[26408]: C1BD9594E: removed
Sieht eigentlich in Ordnung aus, außer, dass du offensichtlich deinen MX Record direkt auf die IP setzt, anstatt auf einen Hostnamen:
warning: numeric domain name in resource data of MX record for <targetdomain>.de: <ip>
Ich weiß nicht ob das evtl. das Problem ist?!
EDIT: Nach Lösung des Problems alle IP- und Mail-Adressen anonymisiert => Spamschutz