Re: Getting rid of rcpt-to check for local mail

[mea@nic.funet.fi]

> Hello!
> 
> How could I take away RCPT-TO: checking from ZMailer 2.99.50-s11 when
> receiving or relaying mail from local intranet (_our_network) mail servers
> ? smtp-policy.src has been setup as

  Add "trustrecipients +" to your "_our_network" macro definition.

/Matti Aarnio

> #| -- 3rd alternate: MX relay trust, DNS existence verify
> #|    For the people who are in deep s*...  That is, those who for some
> #|    reason have given open permissions for people to use their server
> #|    as MX backup for their clients, but don't know all domains valid
> #|    to go thru...  Substitutes accurate data to user's whimsical DNS
> #|    maintenance activities.  Vulnerable to unauthorized inbound MX
> #|    service abuse.
> 
> .                       relaycustomer - acceptifmx - senderokwithdns +
> [0.0.0.0]/0             relaycustomer - acceptifmx - senderokwithdns +
> #
> 194.136.219.0/24        = _our_network
> 
> So we'd like ZMailer to receive all the mail without MX/DNS checks
> for RCPT-TO: addresses. Sure it'll return error message, if the address
> was no ok. 
> 
> The reason is poor SMTP gateway of our office mail system. It does not
> understand those 553 errors coming from ZMailer when sending mail to
> several recipients at the same time and one of those addresses was
> mistyped. That SMTP gw just drops the connection when 553 comes from
> ZMailer. Then it retries the same procedure for fixed 5 days after
> returning the mail to the recipient. We've reported about the problem to
> the author of that gw, but we should get this working fast.
> 
> For incoming internet mail we'd sure want to check MAIL FROM: as well as
> RCPT-TO: for spammers. And MAIL FROM: checks for relayed mail from the
> intranet is ok as well. We'd just like to stop ZMailer to check RCPT-TO:
> for relayed, outgoing mail.
> 
> Tested the same against sendmail-8.9.3. It takes all the mail in without
> checking RCPT-TO: consistency and returned mail with faulty addresses to
> the sender after a try.
> 
> Jussi
> 
> -- 
> 
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> Jussi Torhonen   # E-mail:              jussi.torhonen@tietosavo.fi
> Tietosavo Oyj    # Corporate website:       http://www.tietosavo.fi
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>