Fighting spam via greylisting

TheOldFellow theoldfellow at
Sun Apr 8 23:43:34 PDT 2007

On Sun, 08 Apr 2007 22:32:54 -0500
Bruce Dubbs <bruce.dubbs at> wrote:

> The problem as we can tell is that many large ISPs use multiple
> servers for outgoing MTAs.  This causes a delay for every server.
> Additionally, the retry time is up to the sender and delays of hours
> is not uncommon if the first connection is rejected.  This is not
> acceptable for world wide mailing lists like the ones at LFS.

Can you not greylist on the ip range for the server farm?  This is what
I have to do for gmail.

In that way when a triple (IP,sender,destination) is checked against
the greylist dbase, the IP is masked first, so all the IPs in a range
are treated as the same.

YMMV :-)


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