Hier mal ein Auschnitt aus dem mail.log
Oct 8 20:44:48 mailsrv fetchmail[7477]: 347 messages (346 seen) for vorname.nachname@domain.de at pop.1und1.de (381262097 octets).
Oct 8 20:44:48 mailsrv postfix/smtpd[8293]: connect from localhost[127.0.0.1]
Oct 8 20:44:48 mailsrv postfix/smtpd[8293]: B170B80636: client=localhost[127.0.0.1]
Oct 8 20:44:48 mailsrv postfix/cleanup[8296]: B170B80636: message-id=<74d1mnqn0si56rgmm7pilj1i.1475952157742@email.android.com>
Oct 8 20:44:48 mailsrv fetchmail[7477]: reading message vorname.nachname@domain.de@pop.1und1.de:347 of 347 (8595 octets) not flushed
Oct 8 20:44:48 mailsrv postfix/qmgr[5795]: B170B80636: from=<matt@gmx.de>, size=8939, nrcpt=1 (queue active)
Oct 8 20:44:48 mailsrv postfix/smtpd[8293]: disconnect from localhost[127.0.0.1]
Oct 8 20:44:49 mailsrv postfix/smtpd[8300]: connect from localhost[127.0.0.1]
Oct 8 20:44:49 mailsrv postfix/smtpd[8300]: 3EEAF80A11: client=localhost[127.0.0.1], orig_queue_id=B170B80636, orig_client=localhost[127.0.0.1]
Oct 8 20:44:49 mailsrv postfix/cleanup[8296]: 3EEAF80A11: message-id=<74d1mnqn0si56rgmm7pilj1i.1475952157742@email.android.com>
Oct 8 20:44:49 mailsrv postfix/qmgr[5795]: 3EEAF80A11: from=<matt@gmx.de>, size=9677, nrcpt=1 (queue active)
Oct 8 20:44:49 mailsrv postfix/smtpd[8300]: disconnect from localhost[127.0.0.1]
Oct 8 20:44:49 mailsrv amavis[5141]: (05141-06) Passed CLEAN {RelayedInternal}, LOCAL [127.0.0.1]:35611 [82.212.32.149] <matt@gmx.de> -> < vorname.nachname@domain.de>, Queue-ID: B170B80636, Message-ID: <74d1mnqn0si56rgmm7pilj1i.1475952157742@email.android.com>, mail_id: 7H2yNem_2noL, Hits: 2.195, size: 8939, queued_as: 3EEAF80A11, 506 ms
Oct 8 20:44:49 mailsrv postfix/smtp[8297]: B170B80636: to=<vorname.nachname@domain.de>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.63, delays=0.12/0/0/0.51, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 3EEAF80A11)
Oct 8 20:44:49 mailsrv postfix/qmgr[5795]: B170B80636: removed
Oct 8 20:44:49 mailsrv postfix/smtp[8301]: 3EEAF80A11: to=< vorname.nachname@domain.de>, relay=smtp.1und1.de[212.227.15.183]:587, delay=0.42, delays=0.09/0/0.21/0.12, dsn=5.0.0, status=bounced (host smtp.1und1.de[212.227.15.183] said: 554-Transaction failed 554 Mail loop suspected. (in reply to end of DATA command))
Oct 8 20:44:49 mailsrv postfix/cleanup[8296]: B0CA580A3D: message-id=<20161008184449.B0CA580A3D@mailsrv.domain.de>
Oct 8 20:44:49 mailsrv postfix/qmgr[5795]: B0CA580A3D: from=<>, size=11725, nrcpt=1 (queue active)
Oct 8 20:44:49 mailsrv postfix/bounce[8410]: 3EEAF80A11: sender non-delivery notification: B0CA580A3D
Oct 8 20:44:49 mailsrv postfix/qmgr[5795]: 3EEAF80A11: removed
Oct 8 20:44:50 mailsrv postfix/smtp[8301]: B0CA580A3D: to=<matt@gmx.de>, relay=smtp.1und1.de[212.227.15.167]:587, delay=0.43, delays=0.08/0/0.24/0.11, dsn=2.0.0, status=sent (250 Requested mail action okay, completed: id=0Mgrgq-1bWzwh2xd2-00M3hj)
Oct 8 20:44:50 mailsrv postfix/qmgr[5795]: B0CA580A3D: removed
Die Mails sollten normalerweise via Fetchmail abgeholt und dann in die jweiligen Postfächer verschoben werden. Verschickt wird via Smarthost (relay) von 1und1.de
Das verschicken von Mails funktoniert weiterhin einwandfrei. Nur das Empfangen klappt nicht…
Danke vorab für eure Hilfe.
Grüße