Hi There, We recently moved from RHEL 6/Postfix to CentOS 7/Postfix. I see a change in the maillog that I need help understanding.
We are using mailman to manage three lists totaling 21K subscribers. Each email is sent using VERP so that the Sender and Errors-to headers are unique -- containing an encoded version of the email address that the email is being sent to. This helps with bounce process and the like. The >From header is the same for all of the emails sent and the To header is unique. On the RHEL 6 system, when I count the number of "status=sent" strings in the maillog, the number is the same as the number of emails sent. On the CentOS 7 system the number of "status=sent" is about 25% of the number of emails sent. Can anyone help me understand this change in behavior? Here is the command I am using to view the 4/15 emails in the maillog: cat /var/log/maillog.processed /var/log/maillog | grep status=sent | grep 'Apr 15' | wc 4783 85852 1221343 You can see 4,783 "status=sent" entries on Apr 15 with over 21K emails sent (and verified with DMARC aggregation). Thanks, Greg
