Nabin Limbu wrote:
> Hi everybody,
> 
> My logwatch reports me the following message everyday. What does this
> mean? Is my mail server trying to relay mail to rapti.mos.com.np or is
> rapti.mos.com.np trying to relay mails via my mailserver.
> Also how can I stop these junk mails.
> 
> ruleset=check_mail, arg1=<[EMAIL PROTECTED]>,
> relay=rapti.mos.com.np [202.52.255.23], reject=471 4.7.1 We
> don't accept junk mail: 210 Time(s)

Without seeing one of the "entire" maillog entries for the above, its hard
to tell. But it looks like your mail server rejected an e-mail (210 times)
addressed from [EMAIL PROTECTED] (most likely forged) that used a
relay of rapti.mos.com.np.

> ruleset=check_mail, arg1=<[EMAIL PROTECTED]>,
> relay=my142.mydailydeals.net [69.59.159.142], reject=471
> 4.7.1 We don't accept junk mail: 2 Time(s)

The above looks more like a "legitimate" attempt from one of the
mydailydeals.net servers. Note the relay= has a PTR record that actually
matches the envelope from address. Again, without seeing the entire maillog
transaction, its hard to be sure.

FWIW: I run a low volume mail server at this end. The only time I have seen
200+ rejections (from the same source in one day) was last week. Best I
could tell, the 200+ attempts came from a SOBIG.F infected system. To stop
this madness, I added the relay= machines IP address to my iptables
blacklist file to stop inbound smtp connections from this host.

Steve Cowles


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