Dealing with SPAM WAS has my system been compromised?

[Mike Schwartz]

On 9/14/06, Darrin Chandler <dwchandler at stilyagin.com> wrote:
>
> On Thu, Sep 14, 2006 at 09:24:20PM -0700, George Toft wrote:
> > I find that very few domains use SPF records.  Neat idea, but 99% of the
> > domains have not set them up and most mail servers don't care.
>
> I've been using greylisting for a good while now and it works well
> except for one thing: large email services (Yahoo!, Hotmail, Gmail) use
> a large number of outgoing mail servers. 10 get whitelisted fine and
> then somebody is waiting on an email and it's one of the odd ones from
> gmail stuck in the greylist. gmail does spf, and so do most of the
> others. Whitelisting spf IPs from major email providers fixes that.
>
> SPF can help. It's pretty fast and easy. Best of all, it really doesn't
> *hurt* anything. If there are no SPF records then you don't do anything.
> But if someone's claiming to be from gmail.com and the IP isn't in the
> SPF then you know it's bad.
>
> --
> Darrin Chandler            |  Phoenix BSD Users Group
> dwchandler at stilyagin.com   |  http://bsd.phoenix.az.us/
> http://www.stilyagin.com/  |
> ---------------------------------------------------
> PLUG-discuss mailing list - PLUG-discuss at lists.plug.phoenix.az.us
> To subscribe, unsubscribe, or to change  you mail settings:
> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
>

...if any of you want to read up on the ideas behind
greylisting, there is a good "white paper" at:
  http://projects.puremagic.com/greylisting/whitepaper.html
just F Y I
-- 
Mike Schwartz
Glendale  AZ
schwartz at acm.org
Mike.L.Schwartz at gmail.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.plug.phoenix.az.us/pipermail/plug-discuss/attachments/20060915/1ef89bc2/attachment.htm