Am 15.05.2012 21:44, schrieb Jussi Hirvi: > Our backup mail server (which I have just re-configured) tries to > contact the primary mail server, and fails. My log shows repeatedly > "connection refused": > > May 15 22:21:41 mx2 sm-mta-rx[8674]: q4FIhPij007483: makeconnection > (mail.greenspot.fi. [83.143.217.182]) failed: Connection refused by > mail.greenspot.fi. > May 15 22:21:41 mx2 sm-mta-rx[8674]: q4FIhPij007483: > to=<myuser at mydomain.com>, delay=00:38:16, xdelay=00:00:00, mailer=esmtp, > pri=10021795, relay=mail.greenspot.fi. [83.143.217.182], dsn=4.0.0, > stat=Deferred: Connection refused by mail.greenspot.fi. > > But yet I can successfully telnet that host: > > # telnet mail.greenspot.fi 25 > Trying 83.143.217.182... > Connected to mail.greenspot.fi (83.143.217.182). > Escape character is '^]'. > 220 mail.greenspot.fi ESMTP Sendmail; Tue, 15 May 2012 22:34:22 +0300 It is technically impossible that the telnet to target port 25 succeeds from the same system on which the Sendmail gets a connection refused, unless Sendmail is configured to use a non-standard target port. > Also, the mailer-daemon *can* send automatic warning messages to > mail.greenspot.fi just fine. > > So, the error probably is in my sendmail configuration. > > The error appeared as I today reconfigured the backup mail server to use > a "dual sendmail" setup with amavis and greylisting. How could I proceed? Deeply inspect your sendmail.mc files. Provide them here if you like to get assistance. > - Jussi Alexander