I am moving my phpBB website from a shared server to a VPS. phpBB sends notifications to users that originate from d...@mydomain.net, my email account; and that account can be one of those user recipients. This is currently functioning on my shared server, and I am attempting to set it up on my VPS. I have installed postfix for this purpose, but I am a postfix Newbie.
I will add that the MX records for d...@mydomain.net point to Google Workspace mail servers, where my email is managed. I did some testing from the command line using postfix sendmail, and got the results further below. I will also add that because my login is "mylogin", I had to employ address rewriting as described here to map the FROM "mylogin" to "dan": https://serverfault.com/questions/147921/forcing-the-from-address-when-postf ix-relays-over-smtp When I execute: mylogin@myvps:~$ sendmail -t < mail.txt The email is delivered. Here is the content of mail.txt: To: abc...@gmail.com Subject: Greetings from myvps! From: d...@mydomain.net Hiya. It's me. Here is the mail log when I send from d...@mydomain.net to abc...@gmail.com: Jul 11 13:04:15 myvps postfix/pickup[297634]: C915F60031: uid=1000 from=<mylogin> Jul 11 13:04:15 myvps postfix/cleanup[300279]: C915F60031:message-id=<20210711170415.c915f60...@myvps.myisp.com> Jul 11 13:04:15 myvps postfix/qmgr[297635]: C915F60031: from=<d...@mydomain.net>, size=364, nrcpt=1(queue active) Jul 11 13:04:16 myvps postfix/smtp[300281]: C915F60031: replace: header From: d...@mydomain.net: From: d...@mydomain.net Jul 11 13:04:16 myvps postfix/smtp[300281]: C915F60031: to=<abc...@gmail.com>, relay=smtp.gmail.com[209.85.144.108]:587,delay=2.2, delays=1.2/0.02/0.44/0.51, dsn=2.0.0, status=sent (250 2.0.0 OK 1626023056 f1sm5367114qkh.75 - gsmtp) Jul 11 13:04:16 myvps postfix/qmgr[297635]: C915F60031: removed However, when the From/To are both d...@mydomain.net, the email is *not* delivered, and postfix repeatedly retries without success. Here is the content of mail2.txt which produces this outcome: To: d...@mydomain.net Subject: Greetings from myvps! From: d...@mydomain.net Hiya. It's me. And here is the first failure from the mail log when I send from d...@mydomain.net to d...@mydomain.net: Jul 11 13:08:12 myvps postfix/local[300309]: D89F760060:to=< d...@mydomain.net>, relay=local, delay=0.03,delays=0.01/0.01/0/0.01, dsn=5.1.1, status=bounced (unknown user: "dan") Jul 11 13:08:12 myvps postfix/cleanup[300308]: DE7D360074:message-id=<20210711170812.de7d360...@myvps.myisp.com> Jul 11 13:08:12 myvps postfix/bounce[300310]: D89F760060: sender non-delivery notification: DE7D360074 Jul 11 13:08:12 myvps postfix/qmgr[297635]: DE7D360074:from=<d...@mydomain.net>, size=29843, nrcpt=1 (queue active) Jul 11 13:08:12 myvps postfix/qmgr[297635]: D89F760060: removed Jul 11 13:08:12 myvps postfix/local[300309]: DE7D360074:to=<d...@mydomain.net>, relay=local, delay=0.01, delays=0.01/0/0/0, dsn=5.1.1, status=bounced (unknown user: "dan") Jul 11 13:08:12 myvps postfix/cleanup[300308]: E141760060:message-id=< 20210711170812.e141760...@myvps.myisp.com> Jul 11 13:08:12 myvps postfix/bounce[300310]: DE7D360074: sender non-delivery notification: E141760060 Jul 11 13:08:12 myvps postfix/qmgr[297635]: E141760060: from=<d...@mydomain.net>, size=31795, nrcpt=1 (queue active) Jul 11 13:08:12 myvps postfix/qmgr[297635]: DE7D360074: removed I have seen this infinite loop problem described elsewhere, but because I am a Newbie all proposed solutions read like stereo instructions to me. Can I get some help in understanding the problem, and what it will take to solve it? One other data point, if it matters: the A record for domain mydomain.net still resides with my existing shared server. I won't be moving it to myvps until I resolve all technical issues (there are others, besides phpBB being able to email me). I hope this does not confound the issue. adTHANKSvance, Dan
