1. sendmail trouble: NOQUEUE: SYSERR(root): getrequests: accept: Connection reset by peer
I posted this in comp.mail.sendmail, but didn't receive any responses.
Anyone here have any ideas?
On a machine of mine, frequently I will receive this message in my maillog
regarding an incoming sendmail connection:
Sep 15 12:57:57 ctmail sendmail: NOQUEUE: SYSERR(root): getrequests:
accept: Connection reset by peer
It happens every often, but doesn't happen all the time. A person will
connect to send their mail and will be disconnected from the mail server
immediately and that message will end up in the log file.
sendmail was working fine on an old mail server running RedHat 4.2 with the
sendmail that came with it. Once we converted completely to NAT, (so that
mail server's address became a 10.130.x.x address rather than a normal
Internet address) we started to have this problem. We tried upgrading to the
latest version of sendmail, but that didn't help the problem. So we tried
moving mail server to a COMPLETELY different machine running a completely
different RedHat release with completely different hardware on a completely
different network on a completely different switch... Things worked fine in
the beginnning. Then, after a while, one or two of these messages would
occur. After a longer while, the old problem came back to haunt us on the
COMPLETELY different server. (The only thing alike between the two servers
are the clients that connect to them -- everything dealing with the server
A tcpdump from the old system shows a good connection starting out like
(mail.customer.arl.calltech is the mail server -- callweb is a client
14:34:10.707243 callweb.4131 > mail.customer.arl.calltech.smtp: S
1122715(0) win 32120 <mss 1460,sackOK,timestamp 110154711[|tcp]> (DF)
14:34:10.719242 mail.customer.arl.calltech.smtp > callweb.4131: S
368(0) ack 1451122716 win 32736 <mss 1460>
14:34:10.719304 callweb.4131 > mail.customer.arl.calltech.smtp: . ack 1 win
A tcpdump from the old system shows a bad connection (one that produces the
sendmail error) starting out like this:
14:34:42.806926 callweb.4133 > mail.customer.arl.calltech.smtp: S
1528582(0) win 32120 <mss 1460,sackOK,timestamp 110157921[|tcp]> (DF)
14:34:42.822687 mail.customer.arl.calltech.smtp > callweb.4133: R 0:0(0) ack
1528583 win 0
Any ideas what might be causing this problem?
All the best --
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