Re: sendmail relay

From: atse (dunggaze_at_yahoo.com)
Date: 11/29/03 

Date: Sat, 29 Nov 2003 04:37:06 GMT

I was confused with the end part of the 1st record "we do not relay" and the
next "relay=[210.106.36.47]", which is the same IP relay. I thought this
person should have sent out the email through my server. And I found this
occured many times that someone tried to relay their emails through my email
server. How can I prevent someone from relaying their emails? Thanks

atse

"ynotssor" <"ynotssor"> wrote in message
news:3fc8066c_1@corp.newsgroups.com...
> "atse" <dunggaze@yahoo.com> wrote in message
> news:vZSxb.16060$ZmO.8261@news01.bloor.is.net.cable.rogers.com
>
> > I don't relay for all but the specific IP only to my RH9.0 Linux
> > sendmail server. When I check the maillog, I found a record below.
> > Does it mean someone tried to send email through my email server? Did
> > this guy success to send email out? Security is still my major
> > concern. Thanks for any advice.
> > ---maillog--
> > Nov 28 20:01:55 myserverdns sendmail[2518]: hAT11pES002518:
> > ruleset=check_rcpt, arg1=<ed445@coolmail.net>, relay=[210.106.36.47],
> > reject=551 5.7.1 we do not relay
> > Nov 28 20:01:57 myserverdns sendmail[2518]: hAT11pES002518:
> > from=<23232@454545.com>, size=0, class=0, nrcpts=0, proto=SMTP,
> > daemon=Daemon0, relay=[210.106.36.47]
>
> Someone used a (possibly unsecured) machine at "Dreamcity Media" in Seoul
> South Korea to try and relay email using your server.
>
> The "reject=551 5.7.1 we do not relay" and "nrcpts=0" shows that the relay
> attempt was rejected, and that there were no recipients.
>
> Things are working as they should.
>
>
> tony
>
> --
> use hotmail for any email replies
>
>
>
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