Re: Scope of SMTP Verify

Yakov Shafranovich <[email protected]> wrote:
> >   - Is this machine an MTA which will accept mail, too.
> >     If not, why am I accepting mail from it?
> 
> I don't know if this can be an valid assumption.

  Taken literally, no, it's not true.

  My comment was more about an administrative domain.  If something is
sending mail, but there's no return path, then it doesn't make sense
to accept it.

  See the RFC's on "if you can't deliver a bounce notification, you
probably shouldn't accept the message."

> I agree with SUBMIT. I would add that if its not an MTA, why isn't it 
> using its local MTA with whatever authentication method it has.

  Getting rid of the "my MUA -> someone elses MTA" problem would go a
long way to making the spam problem more managable.

  If you've got to keep track of 10^8 MUA IP's, that's a problem.  If
you've got to keep track of 10^5 MTA's, that's a little easier.

  Alan DeKok.