From: "Henry Tang"
Hi,
My mail log is giving me these type of messages below. Looks like some guy or group of peole is using my smtp server as a relay machine. Fortunately my smtp rules are forbidding it, i think. But how do i stop all these messages in the mail log? The from is not frommy domain and looks like they can access my smtp and send email... I am using suse 7.3 and it is outdated and still working on my new 9.2 box, but i am curious what happened and how to resolve the problem.
thanks henry
], reject=550 5.7.1
... Relaying denied Mar 31 09:12:22 main sendmail[20762]: j2VFCEA20762: from= , size=0, class=0, nrcpts=0, proto=SMTP, daemon=MTA, relay=219-81-229-104.static.tfn.net.tw [219.81.229.104] Mar 31 09:12:22 main sendmail[20765]: j2VFCIA20765: from= , size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=61-31-138-39.dynamic.tfn.net.tw [61.31.138.39] Mar 31 09:12:25 main sendmail[20767]: j2VFCNA20767: ruleset=check_rcpt, arg1= , relay=61-31-138-39.dynamic.tfn.net.tw [61.31.138.39], reject=550 5.7.1 ... Relaying denied
This is just the log of your server doing exactly the right thing. Unless the logs are filling up your disc or these messages are hindering you from seeing others, there is no problem Cheers, Paul.