[GRLUG] Email overload

[Joe Vanderstelt]

On Wed, Apr 30, 2008 at 4:16 PM, Don Wood <dond at standalelumber.com> wrote:
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>  On Wed, 2008-04-30 at 16:11 -0400, Ben Rousch wrote:
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>  On Wed, Apr 30, 2008 at 4:04 PM, Joe Vanderstelt
> <thisboyiscrazy+grlug at gmail.com> wrote:
>
>  many of the people at my company have had the same problem recently. I
>  updated my postfix configuration, implemented gray-listing and SPF.
>  That seemed to fix the problem, at least we no long receive the bouce
>  (Undelverable type) emails.
>
>
>  On Wed, Apr 30, 2008 at 3:45 PM, Ben Rousch <brousch at gmail.com> wrote:
>  >
>  > I don't really have an answer for you, but I noticed that our incoming
> spam
>  > jumped up 100% in the last 2 days. It is up 1000% since the beginning of
> the
>  > year. I was hoping the flood would abate, but it seems to only be getting
>  > worse.
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>  My spam filter (spamassassin w/ bayes + a couple rbls + SARE) is still
> filtering very well - very few spams get through to my users' Inboxes.
> However the mail server is working quite a bit harder with all the extra
> filtering. The 15 minute load average is up from about 0.1 to 0.35.
>
>  Do you have a firewall that you can employ rbls on? I recently did that
> here and dropped the workload on our mail server.
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Are you using a RBL on the TCP/IP connection or at the email level?
If you are doing it at the TCP/IP level, what firewall and what RBL's
are you using?