[nzlug] (OT) Sorbs etc, was Exim: Limiting outgoing connections on Debian

[Cliff Pratt]

Michal Ludvig wrote:
> Cliff Pratt wrote:
> 
>> Greylisting is an evil perversion of the SMTP protocol and if I find 
>> any servers using it I blacklist them. Nasty obnoxious bandwidth and 
>> spool space wasters!
> 
> Go ahead and blacklist my postfix+greylisting, yet perfectly RFC 
> compliant mail server, if it makes you day any better :p
> 
> Geez ... there is nothing wrong with greylisting. That's the expectation 
> that any mail must arrive within a second which is wrong. Indeed some 
> companies may decide that the short delay for the first mail in each 
> from->to communication that greylisting imposes is a bigger evil than 
> the tons of spam refused but that's their decision. If it isn't 
> acceptable for you don't use it. But if it works for me let me use it. 
> I'm within the boundaries of the RFC so there is really nothing that may 
> upset you. Except for your irrational allergy for greylisting perhaps.
> 
Greylisting adds a load to my servers. Greylisting is at the bounds of 
the RFC and totally subverts the idea of retrying failed sends. The 
retry facility is intended for temporary errors, not for SPAM control!

Greylisting is also ineffective at stopping SPAM and very effective at 
preventing delivery of legitimate emails.

Greylisters tend to be the worst setup mailservers in other ways, using 
  greylisting as a reson for not taking other email precautions.

Cheers,

Cliff