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For this server I'm running virtualmin. It comes with postfix. One of my users is complaining he's not receiving all the e-mails. To check this I let postfix forward his e-mails to another e-mail address (gmail). He is receiving the e-mails in gmail, not in postfix. The messages are not marked as spam. The e-mails can't be found anywhere.

Example of the logs:

[root@server]# grep ***messageid9F63AA8003***@***.gbl /var/log/maillog
Sep 24 12:10:44 server postfix/cleanup[1827]: 6248E3BC0243: message-id=<***messageid9F63AA8003***@***.gbl>
Sep 24 12:10:44 server spamd[16387]: spamd: processing message <***messageid9F63AA8003***@***.gbl> for mail.account:524
Sep 24 12:10:46 server spamd[16387]: spamd: result: . -2 - FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,RP_MATCHES_RCVD scantime=1.4,size=2198,user=mail.account,uid=524,required_score=4.0,rhost=localhost,raddr=127.0.0.1,rport=335,mid=<***messageid9F63AA8003***@***.gbl>,autolearn=ham
Sep 24 12:10:46 server postfix/cleanup[1827]: 8BD433BC056E: message-id=<***messageid9F63AA8003***@***.gbl>

This looks good, so I'm looking further:

[root@server]# grep 8BD433BC056E /var/log/maillog
Sep 24 12:10:46 server postfix/cleanup[1827]: 8BD433BC056E: message-id=<***messageid9F63AA8003***@***.gbl>
Sep 24 12:10:46 server postfix/local[1828]: 6248E3BC0243: to=<mail.user@hostname.server.com>, orig_to=<mail@account.com>, relay=local, delay=2, delays=0.2/0/0/1.8, dsn=2.0.0, status=sent (forwarded as 8BD433BC056E)
Sep 24 12:10:46 server postfix/qmgr[26692]: 8BD433BC056E: from=<user-from@hotmail.com>, size=2252, nrcpt=1 (queue active)
Sep 24 12:10:47 server postfix/smtp[1850]: 8BD433BC056E: to=<userforward@gmail.com>, orig_to=<mail@account.com>, relay=gmail-smtp-in.l.google.com[173.194.70.26]:25, delay=2.5, delays=1.8/0/0.18/0.49, dsn=2.0.0, status=sent (250 2.0.0 OK 1380017236 l42si26334755eef.298 - gsmtp)
Sep 24 12:10:47 server postfix/qmgr[26692]: 8BD433BC056E: removed

Here postfix claims it delivered the e-mail to the mailbox. Though it does not show. What can I still have done wrong? Any hints?

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How are you confirming the user is not getting mail? –  CIA Sep 26 '13 at 21:00
    
The user calls me every day when he receives a mail on the gmail account that was sent to the user account but was not arrived in the user account. The user is trustworthy ... –  fraksken Sep 27 '13 at 15:13
1  
Are you keeping a local copy of the user's mail when you forward it? –  CIA Sep 27 '13 at 15:20

1 Answer 1

What you see in above snippet is log when postfix forward email without keeping local copy. In plain terms, forwarding was same with changing recipient of email.

Above snippet contains to queue-id 6248E3BC0243 and 8BD433BC056E. When postfix get email from hotmail, it gives queue-id 6248E3BC0243. Because you set forwarding, so postfix forward it and logs the action in this line.

Sep 24 12:10:46 server postfix/local[1828]: 6248E3BC0243: to=, orig_to=, relay=local, delay=2, delays=0.2/0/0/1.8, dsn=2.0.0, status=sent (forwarded as 8BD433BC056E)

That line tells us that postfix successfully (status=sent) forward it to another email address. Postfix gives queue-id 8BD433BC056E for the forwarded email.

Of course you should gives us more info (like this maillog line) when user receive email but the email doesn't exist in his mailbox.

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