[Mimedefang] Dealing with massive spam burst
Patric Wust
patric.wust at cdv.de
Thu Sep 9 02:38:08 EDT 2004
> Has anyone come up with a 'pure sendmail' way to accomplish this? That
> is, given a firewalled machine running sendmail, to periodically rebuild
> an access list containing all the addresses it will accept, and on the
> exposed machine a way to merge the lists from an assortment of
> destination machines?
I rather use an event-driven than a periodically-run update.
I wrote a bash script which is invoked on any delivering local MTA
each time an account or alias is changed. The script collects all
relevant information (domains, accounts, aliases) from all in-house MTA,
and then sychronizes the data with sendmail's access, virtuser-domains,
and virtusertable at the mailgateway.
Local MTA's are qmail, Gateway-MTA is sendmail with MIMEDefang. Works
perfectly here. The effect of this was a reduction of incoming mail traffic
by 80% only by revoking wrong recipients during the envelope part of a
SMTP session. The remaining 20% are then handled by MIMEDefang.
Rgds,
Patric
More information about the MIMEDefang
mailing list