Date: Thu, 19 Jun 2003 09:50:50 -0300 (ART) From: Fernando Gleiser <fgleiser@cactus.fi.uba.ar> To: Andreas =?iso-8859-1?Q?Wider=F8e?= Andersen <awand@pragma.no> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Do I have an open relay? Message-ID: <20030619094727.W61487-100000@cactus.fi.uba.ar> In-Reply-To: <5.2.0.9.0.20030619141344.02971008@mail.pragma.no>
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On Thu, 19 Jun 2003, Andreas Wider=F8e Andersen wrote: > Hi, > I'm a bit nervous here. Recently I've started getting 20-25 mails to my > Postmaster account on my FreeBSD 4.8RC server running Sendmail > 8.12.8/8.12.8 each day with a message to Postmaster that the mail could n= ot > be delivered. Sendmail by default does not relay, unless you enable PROMICUOUS_RELAY. To test if you have an open relay, go to: http://www.abuse.net/relay.html and run a test against your server. It may be a "rumplestinkin attack", the spammers are trying to guess account names in your server, postmaster gets a copy of the bounce. Look at the logs for the full info. =09=09=09Fer
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