Re: [Security-Discuss] Problems of SPAM with Postfix

On Tue, 2004-06-08 at 14:01, Tommaso Leonardi wrote:
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> 
> Good day list,
> I'm not so sure I'm on topic, however I'm so desperate that I'll ask
> your help.
> I set up a little mail server NOT for personal use; I give mailboxes
> to  20 or maybe 30 people I know, but I expect to have in three or
> four month about 100 mailboxes. My biggest problem is the spam. I
> didn't think the spam was a so big problem and I understimate it. The
> result is that i found  more than 4000 massages in my mail queue to a
> Yahoo server in the Est. I installed Spamassassin and Anomy Sanitizer
> according to this tutorial
> (http://advosys.ca/papers/postfix-filtering.html) but the problem is
> still surviving.... I'm afraid to be in some black list because of the
> thousand of spam massages i sent...is it possible? I considered also
> the possibility to use smtpd SASL authentication, but i though that if
> the other provider in the network don't use it, there must be another
> solution....
> 
> Please help me.....thankyou very much in advance and sorry if I'm off
> topic,
> 
> Tommaso Leonardi

Sounds like you might be running an open relay. Go here -
http://www.abuse.net/relay.html - to test it.

Also, you might want to think about using the blocklists at your end.
http://www.securitysage.com has a good tutorial. I've found blocklists
to be the only really effective way of blocking spam - especially the
SORBS one that blocks all mail from dynamic IP addresses.

Matt

-- 
http://www.mpcontracting.co.uk
Experts in Java development and website design

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