Sendmail: How does one blacklist annoying spammers?

[Ed Greshko]

On 06/27/2010 03:55 AM, Greg Woods wrote:
>
> It should be noted that greylisting *will* cause some delays in
> legitimate messages, and the length of the delay is totally under the
> control of the sending server. Personally, I think any communication
> that can't tolerate a few minutes or even an hour delay should be sent
> by some medium other than e-mail (instant messaging, even a phone call),
> but that said, I do get a lot of complaints about delays caused by
> greylisting, so this should be borne in mind. Most people shut up when I
> offer to turn if off for them so they can instantly receive all their
> spam :-)
>
>
>   
A well written greylisting milter will utilize a database to maintain a
list of sending MTAs that have retried.  Additionally, the good milters
will have the ability to specify whitelists and blacklists.  But, even
if you don't do the work to populate the lists this mostly results in
only the very first message sent by a "trusted" MTA being delayed. 
After the initial start-up, training period normal communication
proceeds without delay.


-- 
It seems like the less a statesman amounts to, the more he loves the
flag. 葛斯克 愛德華 / 台北市八德路四段

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