Hi There...
We are running Postfix 2.6.14. What we are seeing is that one of our client sent a bulk email yesterday using their LYRIS mailing program. *-bash-3.2# zgrep LYRIS maillog-20140701.gz | wc -l* *6826* So 6826 got through but there’s a few thousand missing they reported. Looking further into this, I can see about 4000+ resets from their IP address, so this might correspond to the missing emails not having been sent. Not sure if my hunch is correct or not. *-bash-3.2# zgrep 10.84.66.53 maillog-20140701.gz | grep RSET | wc -l* *4637* I'm not entirely sure what these RSETs are but they could be that the customer was hammering our mail server and we ran out of smtpd connections/processes to handle it. Talks about it here: http://marc.info/?l=postfix-users&m=104638427320107&w=2 \\ snippet of the RSET errors Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8837]: timeout after RSET from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8837]: disconnect from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8838]: timeout after RSET from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8838]: disconnect from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8830]: timeout after RSET from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8830]: disconnect from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8833]: timeout after RSET from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8833]: disconnect from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8836]: timeout after RSET from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8836]: disconnect from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8826]: timeout after RSET from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8826]: disconnect from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8831]: timeout after RSET from unknown[10.84.66.53] Jun 30 12:21:21 cllxprmgtsmtp01 postfix/smtpd[8831]: disconnect from unknown[10.84.66.53] Thanks. Andy