[Greylist-users] greylist lib in C? + several Q's

[Tomasz /Lomotowski]

On Sun, Aug 29, 2004 at 04:27:06PM -0400, Ken Raeburn wrote:

> Other comments were that when important mail gets delayed, users get
> pissed off at the postmasters of either or both sites, regardless of
> advertised policies and which site actually caused the delay, and they
> don't want to deal with that.  I guess having users generally pissed
> off about the level of spam in their mailboxes is preferable.
> 
> Ken

Well would you know I am postmaster at the University as well? :)
To be honest I have fairly good situation at the moment. Users _forced_
me to do something with the spam and that was what I've been waiting
for. Some of them are radicals to the bone demanding crucifying of all
mail that even passed close to the spam. One thing that is important, I
don't use methodes that dump e-mails without user's knowing about it
(almost, some RBLs are at work lately) So it is greylisting (yes it does
not drop mails directly!) DCC and SA in tagging mode. Users can decide
if they want to discard tagged emails and at what level. That shuts the
subject down when it comes to unhappy customers.

Ken, now to the better part. Greylisting is not resource-consuming when it
is correctly configured. If you have high bandwidth you can set database
outside of the mail server and you will notice only slighty higher CPU
usage and a bit more memo. I don't run the statistics but it is around
0.45% for greylisting daemon atm and it stay at that level even while
email-floods. Database gets 5% up to 15% when heavily
used. Database is not dedicated for greylisting only, other processes
and users can freely work at it (we have internet radio working at this
as well :) )

Thomas