SMTP AUTH - was: High-load servers...

[listy-dyskusyjne Krzysztof Dabrowski]

>relaying.  What control mechanism are you using?  SMTP after POP is pretty
>easy, and I think there's stuff already on the qmail web site implementing
>it.

There is atleast one smtp client from redmond that never does POP before 
SMTP if there is something to send prefering to do POP after SMTP :).
Because of that we (large ISP with roaming customers) can not use it.
The right thing is to use SMTP AUTH but the only patch available leaves 
much  things to improve.
POP before smtp also stinks because you have to recreate an "allowed IP's 
list" after every POP connection and this also is performace killer.
Actualy i'll be paid to enhance the SMTP AUTH patch to support more 
authentication types so you can expect it next month if time permits.

BTW: Has anybody hacked on SMTH AUTH??