Linux – e-mail ratelimit exim

emailemail-servereximlinuxrate-limiting

Server1 sending to Server2:

Connecting to domain.com [1.1.1.1]:25 ... connected
  SMTP<< 451 Temporary local problem - please try later
  SMTP>> QUIT
LOG: MAIN
  SMTP error from remote mail server after initial connection: host domain.com [1.1.1.1]: 451 Temporary local problem - please try later
LOG: MAIN
  == alerts@domain.com R=dkim_lookuphost T=dkim_remote_smtp defer (0): SMTP error from remote mail server after initial connection: host domain.com [1.1.1.1]: 451 Temporary local problem - please try later
LOG: queue_run MAIN
  End queue run: pid=42746 -qff

Server2:

2013-02-13 19:35:07 1U5mn3-0006KF-Ft Completed
2013-02-13 19:38:36 SMTP connection from [1.1.1.1]:10702 (TCP/IP connection count = 1)
2013-02-13 19:38:36 no IP address found for host 1.1.1.1.choopa.net (during SMTP connection from [1.1.1.1]:10702)
2013-02-13 19:38:36 H=(host.domain.com) [1.1.1.1]:10702 F=<> rejected RCPT <alerts@domain.com>: "
2013-02-13 19:38:37 H=(host.domain.com) [1.1.1.1]:10702 F=<> rejected RCPT <alerts@domain.com>: "
2013-02-13 19:38:37 H=(host.domain.com) [1.1.1.1]:10702 F=<> rejected RCPT <alerts@domain.com>: "
2013-02-13 19:38:37 H=(host.domain.com) [1.1.1.1]:10702 F=<> rejected RCPT <alerts@domain.com>: "
2013-02-13 19:38:37 H=(host.domain.com) [1.1.1.1]:10702 Warning: "Detected session with all messages failed"
2013-02-13 19:38:37 H=(host.domain.com) [1.1.1.1]:10702 Warning: "Increment slow_fail_block Ratelimit - (host.domain.com) [1.1.1.1]:10702 because of all messages failed"
2013-02-13 19:38:37 SMTP connection from (host.domain.com) [1.1.1.1]:10702 closed by QUIT
2013-02-13 19:38:37 SMTP connection from [1.1.1.1]:10723 (TCP/IP connection count = 1)
2013-02-13 19:38:38 no IP address found for host 1.1.1.1.choopa.net (during SMTP connection from [1.1.1.1]:10723)
2013-02-13 19:38:38 H=[1.1.1.1]:10723 temporarily rejected connection in "connect" ACL: "Host is ratelimited due to multiple failure only connections (5.8/1h max:5)"
2013-02-13 19:38:38 SMTP connection from [1.1.1.1]:10725 (TCP/IP connection count = 1)
2013-02-13 19:38:38 no IP address found for host 1.1.1.1.choopa.net (during SMTP connection from [1.1.1.1]:10725)
2013-02-13 19:38:38 H=[1.1.1.1]:10725 temporarily rejected connection in "connect" ACL: "Host is ratelimited due to multiple failure only connections (5.8/1h max:5)"
2013-02-13 19:38:39 SMTP connection from [1.1.1.1]:10735 (TCP/IP connection count = 1)
2013-02-13 19:38:39 no IP address found for host 1.1.1.1.choopa.net (during SMTP connection from [1.1.1.1]:10735)
2013-02-13 19:38:39 H=[1.1.1.1]:10735 temporarily rejected connection in "connect" ACL: "Host is ratelimited due to multiple failure only connections (5.8/1h max:5)"
2013-02-13 19:38:40 SMTP connection from [1.1.1.1]:10740 (TCP/IP connection count = 1)
2013-02-13 19:38:40 no IP address found for host 1.1.1.1.choopa.net (during SMTP connection from [1.1.1.1]:10740)
2013-02-13 19:38:40 H=[1.1.1.1]:10740 temporarily rejected connection in "connect" ACL: "Host is ratelimited due to multiple failure only connections (5.8/1h max:5)"
2013-02-13 19:38:40 SMTP connection from [1.1.1.1]:10741 (TCP/IP connection count = 1)

How do I remove the ratelimit?

Best Answer

Remove your ratelimit database. That's just a fancy name for the local db4 cache file that exim maintains with ratelimit state information (since it's a db file and not in memory, the state can survive exim restarts and server reboots).

On an rpm based system, it would probably be located at /var/spool/exim/db/ratelimit*. I suggest that you first stop exim, and I mean completely stop it. On rpm based systems that means service exim stop; service exim stop (that's right, twice). Then delete the file including ratelimit.lockfile if it's present. Then start exim back up, it will create the ratelimit cache file again when it needs it.

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