[TriLUG] Another seal not yet broken... using Greylisting

[Dave Sorenson]

I've got mine set to 30 seconds and the longest delay I've seen during 
testing was about 5 minutes. I can say that I have not seen any problems 
with large server farms (google, hotmail, yahoo, mindspring) dealing 
with the greylist. Nor have I seen issuse from my work, or the various 
state agency servers I get mail from friends from. (I'm using the 
greylist-milter with Sendmail if that matters.)

To borrow an old line ... You can have my greylist-milter when you pry 
it from my cold dead server.. (apologies for the drama) ;-)

Dave

Douglas Ward wrote:
> I implemented greylist.pl in my environment (~25k messages per day) and
> found it to not work well.  Many of the large isp's have multiple 
> outgoing
> e-mail servers which results in the following scenario:
>
> Server 1 attempts to deliver from somebody at test.com and is greylisted.
> After defined pause Server 2 attempts to deliver from 
> somebody at test.com and
> is greylisted again.
> After another defined pause Server 3 attempts to deliver from
> somebody at test.com and is greylisted again.
>
> I imagine this is three entries in the database file for future messages.
> The end user's message never delivers and they freak out.  I know the 
> answer
> is to probably whitelist these domains but I didn't have the time to 
> keep up
> with it.
>
> Another issue that I ran across was even though I had set the greylist to
> accept after 30 seconds the sending server would wait much longer to try
> again (sometimes a half day or more).
>
> Do you see this behavior on your side?  I would love to turn the rule 
> back
> on but it caused too many interruptions.  YMMV though.  Thanks!
>