Hi, yesterday i noticed an unexpected behaviour. This mail is lingering in the outbound queue on my mailserver:
54086E032F 10413683 Fri Feb 7 14:04:21 some.user@my.domain (lost connection with apple.de[17.149.160.31] while receiving the initial server greeting) pre...@apple.de Searching the postfix log i found out that postfix tries to deliver this email with no effort: Feb 10 13:20:08 mx-50 postfix/qmgr[17611]: 54086E032F: from=<some.user@my.domain>, size=10413683, nrcpt=1 (queue active) Feb 10 13:21:22 mx-50 postfix/smtp[17651]: 54086E032F: lost connection with apple.de[17.172.224.31] while receiving the initial server greeting Feb 10 13:22:37 mx-50 postfix/smtp[17651]: 54086E032F: lost connection with apple.de[17.178.96.17] while receiving the initial server greeting Feb 10 13:23:52 mx-50 postfix/smtp[17651]: 54086E032F: to=<pre...@apple.de>, relay=apple.de[17.149.160.31]:25, delay=256771, delays=256547/0/225/0, dsn=4.4.2, status=deferred (lost connection with apple.de[17.149.160.31] while receiving the initial server greeting) Feb 10 14:35:08 mx-50 postfix/qmgr[6779]: 54086E032F: from=<some.user@my.domain>, size=10413683, nrcpt=1 (queue active) Feb 10 14:36:22 mx-50 postfix/smtp[4114]: 54086E032F: lost connection with apple.de[17.178.96.17] while receiving the initial server greeting Feb 10 14:37:37 mx-50 postfix/smtp[4114]: 54086E032F: lost connection with apple.de[17.172.224.31] while receiving the initial server greeting Feb 10 14:38:52 mx-50 postfix/smtp[4114]: 54086E032F: to=<pre...@apple.de>, relay=apple.de[17.149.160.31]:25, delay=261272, delays=261047/0/225/0, dsn=4.4.2, status=deferred (lost connection with apple.de[17.149.160.31] while receiving the initial server greeting) Now the strange thing. There is no mx record for apple.de: root@mx-50:~# host -t mx apple.de apple.de has no MX record So how could postfix determine the mxer for this Domain? Apparently postfix uses the a records: root@mx-50:~# host -t a apple.de apple.de has address 17.178.96.17 apple.de has address 17.149.160.31 apple.de has address 17.172.224.31 Why? these Feature is off by Default and not activated on my mailserver: root@mx-50:~# postconf -d | grep ignore_mx_lookup_error ignore_mx_lookup_error = no root@mx-50:~# postconf -n | grep ignore_mx_lookup_error root@mx-50:~# [no Output] How can i turn this off? TIA, Peter
