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Old 03-21-2006, 09:25 AM   #1
rizhun
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Registered: Jun 2005
Location: England
Distribution: Ubuntu, SLES, AIX
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Open Relay?


Hi,

I'm concerned that I might have an open relay...

/var/log/maillog:
Code:
Mar 21 00:17:12 nexus sendmail[3301]: rejecting connections on daemon MTA: load average: 17
Mar 21 00:17:12 nexus sendmail[3301]: rejecting connections on daemon MSA: load average: 17
Mar 21 00:17:27 nexus sendmail[3301]: rejecting connections on daemon MTA: load average: 17
Mar 21 00:17:27 nexus sendmail[3301]: rejecting connections on daemon MSA: load average: 17
Mar 21 00:17:42 nexus sendmail[3301]: rejecting connections on daemon MTA: load average: 17
Mar 21 00:17:42 nexus sendmail[3301]: rejecting connections on daemon MSA: load average: 17
Mar 21 00:17:57 nexus sendmail[3301]: rejecting connections on daemon MTA: load average: 17
Mar 21 00:17:57 nexus sendmail[3301]: rejecting connections on daemon MSA: load average: 17
Mar 21 00:18:12 nexus sendmail[3301]: rejecting connections on daemon MTA: load average: 17
Mar 21 00:18:12 nexus sendmail[3301]: rejecting connections on daemon MSA: load average: 17
Mar 21 00:18:27 nexus sendmail[3301]: rejecting connections on daemon MTA: load average: 17
Mar 21 00:18:27 nexus sendmail[3301]: rejecting connections on daemon MSA: load average: 17
Mar 21 00:18:42 nexus sendmail[3301]: rejecting connections on daemon MTA: load average: 17
Mar 21 00:18:42 nexus sendmail[3301]: rejecting connections on daemon MSA: load average: 17
Mar 21 00:18:57 nexus sendmail[3301]: rejecting connections on daemon MTA: load average: 17
Mar 21 00:18:57 nexus sendmail[3301]: rejecting connections on daemon MSA: load average: 17
Mar 21 00:19:12 nexus sendmail[3301]: rejecting connections on daemon MTA: load average: 17
Mar 21 00:19:12 nexus sendmail[3301]: rejecting connections on daemon MSA: load average: 17
Mar 21 00:19:27 nexus sendmail[3301]: rejecting connections on daemon MTA: load average: 17
Mar 21 00:19:27 nexus sendmail[3301]: rejecting connections on daemon MSA: load average: 17
Mar 21 00:19:42 nexus sendmail[3301]: rejecting connections on daemon MTA: load average: 17
Mar 21 00:19:42 nexus sendmail[3301]: rejecting connections on daemon MSA: load average: 17
Mar 21 00:19:57 nexus sendmail[3301]: rejecting connections on daemon MTA: load average: 17
Mar 21 00:19:57 nexus sendmail[3301]: have been rejecting connections on daemon MTA for 11+12:14:36
Mar 21 00:19:57 nexus sendmail[3301]: rejecting connections on daemon MSA: load average: 17
Mar 21 00:19:57 nexus sendmail[3301]: have been rejecting connections on daemon MSA for 11+12:14:36
There appear to be entries in the log numbering several a second. I do not know how I could be relaying email, port 25 on my router is closed!!

Please could someone help me trouble-shoot this?
 
Old 03-21-2006, 09:52 AM   #2
bathory
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Registered: Jun 2004
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You should run
Code:
top
to see what process(es) have raised your load average. Sendmail refuses connections if load average raises above a certain limit (12 by default). Take a look here to see why. If everyrthing is normal you can increase those limits.

Regards
 
  


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