[Greylist-users] recommendations for dual MX system?

Eric Brunson brunson at brunson.com
Mon May 2 08:42:22 PDT 2005

Graham Toal wrote:

>>Why not have both MTAs talk to a database on another machine?  SQLGrey
>>running on a 1.2MHz athlon currently handles about 5000 messages a day
>>for me, but that's also running on the same box as the MTA, database and
>>Spamassassin.  If you were to put the database on a separate machine and
>>have the MTAs talk to it remotely you'd have syncronized greylisting and
>>offload the greylisting overhead.
>two reasons:
>1) One of my constraints is to do something reasonably soon.  If I didn't
>have that limitation, I would add greylisting directly to my existing
>spam filter.  I spent a week learning how to set up spamd and I was
>trying to avoid replacing it with another system this soon ;-)
>(And one of the reasons I liked the spamd suggestion was that it avoided
>the overhead and learning curve of administering an SQL server...)
The overhead of administering mysql is unbelievably trivial, but never mind.
There's never time to do it right, but there's always time to do it again.

>2) talking to a single SQL server brings back a single point of failure,
>which I'm trying to avoid.
That can be addressed, also, I just didn't want to complicate the

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