[Mimedefang] Re: On pinheaded ISP's (sort of OT)

[Les Mikesell]

Kevin A. McGrail wrote:
>> If you can't reject during the initial SMTP phase, then your NDR's of 
>> spam,
>> with their possible forged envelope addresses, will also be spam. So, 
>> if you
>> can't drop at the initial conversation, or it is relayed from a backup 
>> MX, it
>> is your message, and your problem. Just don't generate NDR's. If you 
>> can't
>> return at SMTP, you will need to drop it.
> 
> We'll politely disagree because I am doing my best to reject mail 
> including having backup servers query primary servers for valid email 
> addresses but when the primary server is down, we MUST queue mail up on 
> our servers.  If people choose to view that as us being the source of 
> SPAM, then they are negating the entire point of having backup MX's for 
> when stuff hits the fan.

Is 'your' queue better than everyone else's?  Why not do a 4xx tmpfail 
if your address check temporarily fails?  Any real MTA should be 
prepared to queue and retry.

-- 
   Les Mikesell
    les at futuresource.com