[CentOS] sendmail and spam

[Peter Farrell]

I agree with previous poster RE: Postini, we have clients that use the
service and it's fantastic.

I use Postfix / Amavisd - Clam-AV / SpamAssassin + SARE rulesets (with
DCC, Pyzor, Razor) locally and ater the initial setup it's excellent.

I've also done just Postfix / Amavisd - Clam-AV / SpamAssassin + SARE
and used Greylisting for other clients as well and that's been
unbelievable. Greylisting as a method to reduce spam is the heat!

In both of the above setups are spread across 3 machines in a
multi-tiered architecture. Use your DMZ to pre-filter, with Postgrey,
header checks, body checks, then allow to next hop where you can
spam-check, virus check, then allow to local intranet mail server for
local delivery / IMAP.

But if you want to farm it out - use Postini.

-Peter



2008/6/8 Jason Pyeron <jpyeron at pdinc.us>:
>
>
>> -----Original Message-----
>> From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On
>> Behalf Of Frank Cox
>> Sent: Sunday, June 08, 2008 4:04 PM
>> To: CentOS mailing list
>> Subject: Re: [CentOS] sendmail and spam
>>
>> On Sun, 08 Jun 2008 15:39:31 -0400
>> Mark Weaver <mdw1982 at mdw1982.com> wrote:
>>
>> > I.e. if a business in Pennsylvania only does business in the lower 48
>> > there isn't any need to accept port 25 traffic from Asia, Europe, Latin
>> > America, etc...
>
> We have foreign language emails from foreign countries, so this and other
> assumptions about content are a big no-no.
>
>>
>> Until "something comes up" and your users and/or customers are sunk.
>>
>
> Ditto.
>
> We are using Postini. It is a spam filtering service from Google at 3$ per
> email address (aliases are free) per year. We have no load they are
> promising the API will be re-enabled in the upcoming weeks.
>
> We have only had 2 messages with a false positive and one with a false
> negative. Mail volume is around 10,000 messages per day. Latency is next to
> zero.
>
> Sorry for the advert, but its what we are using.
>
> Jason
>
>
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