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see the original version.\r\n\r\nThose should be rejected during the smtp
session, any bounce message should be generated by the sender's server. Maybe
you are generating delivery failure messages for local users?
Probably "backscatter".
Someone sends a message to a random address on your server, and the server send back a error reply if that username/e-mail address doesn't exist. The addresses are compiled by using the book of names for babies, and other lists - all trying to guess valid e-mail
According to Usage Information, Email, Senders localhost on one of my
5209R servers has sent 13,990 emails this month. Mostly during one week
and one other day.
Is there any reasonable explanation for this behavior?
What to do?
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Blueonyx
Hi Lewis,
> Is tcpdump installed on 5209R?
No, but it is available via YUM.
--
With best regards
Michael Stauber
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Michael Stauber wrote:
Hi Lewis,
Back when I was smarter it seems I used tcpdump to watch traffic on
ports. Would that be a thing to do here?
Yeah, something like this will let you SMTP-traffic:
tcpdump -v -s 1500 -i eth0 port 25
Is tcpdump installed on 5209R?
