Mark Martinec wrote:
> Simon,
> 
>> I have amavis sitting in front of our internal mail server using SMTP
>> sockets to receive and send on the network.  It's all working fine
>> except for one annoyance...
> 
> It is a non-recommended setup. Although amavisd-new does provide
> a fully standards-compliant SMTP server, it lacks refinements
> of a fully-fledged MTA, such as dealing efficiently with abuse,
> handling many parallel SMTP sessions, recipient verification, ...
> 

OK, thanks for the advice.

>> When one of our MX hosts does a recipient callout (to our internal mail
>> server via amavis), amavis always replies with 250 to an invalid local
>> address even though the same SMTP session made directly to our internal
>> mail server would reply with 550.   I can only assume that amavis is
>> doing 'store & forward' and not communicating with the internal mail
>> server until it has accepted the incoming message.  Is this right?
> 
> Right. This is a duty of a front-end MTA,
> amavisd-new was never intended to take place of a MTA.
> 

Well the front-end MTA (MX host) is doing this, it's just the recipient 
callout it makes stops at amavis and doesn't get through to the internal 
mail host.  It would have been really convenient to have been able to do 
this :-)

>> Can amavis do recipient callout before accepting a message?
> 
> No.
> 
>   Mark
> 

I guess I'll have to integrate amavis with the internal mail host 
instead, rather than have it standalone?

Thanks,

Simon




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