Re: [Exim] Using Exim on a large volume fallback MX

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Autor: Suresh Ramasubramanian
Data:  
Para: Exim
Assunto: Re: [Exim] Using Exim on a large volume fallback MX
Andromeda rearranged electrons thusly:

> 1. Make your users connect to your mailservers, and use specific incoming
> and outgoing servers. What I mean with this is that spam mailers usually


port 25 filtering? ELNK already does this I think

> 2. Restrict the amount of recipients that can be sent to. Spammers tend to
> send spam with huge recipient lists. Yahoo and Hotmail already restrict


quite viable

> 3. Use system message filtering to filter for specific starts or endings in
> messages (newer spam messages have a disclaimer stating that it is sent in


It might work out as Nigel posted ...

> 4. Use a POP-before-SMTP authentication scheme. Your user has to fetch mail
> first before he can send email. This works quite well at Pair Networks and


Why? As a dialup provider instead of a hosting provider, Earthlink has RADIUS
logs and such ... no trouble tracking the spammer either.

--
Suresh Ramasubramanian <--> mallet <at> efn <dot> org
EMail Sturmbannfuhrer, Lower Middle Class Unix Sysadmin