I have a machine running a very old version of postfix. In trying to troubleshoot a discrepancy between what some reports I was pulling from the postfix logs vs what my upstream relay was saying I was sending I noticed something that looks off to me.
[ssm-user@ip-10-104-84-189 ~]$ sudo grep -E "C78B04FBDFB|7AECF4E97A8|690834E92AC" /var/log/maillog* /var/log/maillog:Feb 9 13:00:03 ip-10-104-84-189 postfix/smtp[3788]: 690834E92AC: to=us...@gmail.com<mailto:us...@gmail.com>, relay=send.hidden.com[x.x.x.x]:587, delay=5.6, delays=0.01/5.1/0.29/0.19, dsn=2.0.0, status=sent (250 OK ) /var/log/maillog:Feb 9 13:00:03 ip-10-104-84-189 postfix/qmgr[21067]: 690834E92AC: removed /var/log/maillog:Feb 9 13:00:03 ip-10-104-84-189 postfix/smtp[3800]: 7AECF4E97A8: to=us...@gmail.com<mailto:us...@gmail.com>, relay=send.hidden.com[x.x.x.x]:587, delay=5.9, delays=0/5.4/0.32/0.24, dsn=2.0.0, status=sent (250 OK ) /var/log/maillog:Feb 9 13:00:03 ip-10-104-84-189 postfix/qmgr[21067]: 7AECF4E97A8: removed /var/log/maillog:Feb 9 13:00:05 ip-10-104-84-189 postfix/smtp[3798]: C78B04FBDFB: to=us...@gmail.com<mailto:us...@gmail.com>, relay=send.hidden.com[x.x.x.x]:587, delay=7.3, delays=0.01/6.9/0.29/0.12, dsn=2.0.0, status=sent (250 OK ) /var/log/maillog:Feb 9 13:00:05 ip-10-104-84-189 postfix/qmgr[21067]: C78B04FBDFB: removed That's the only records in the logs for those queue id's. There isn't any of the normal inbound stuff I'm used to seeing. I've shifted sending to another box running a newer version of postfix for now, but I'm curious if there is a known bug or if I've got something set up weird. It's not happening all the time, but at various times. [ssm-user@ip-10-104-84-189 ~]$ postconf mail_version mail_version = 2.10.1
