Reject emails to nonexistent addresses?

[Adri Koppes]

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Gib,

That would be another way of dropping mail for non-existent users, provided
the accepting server doesn't have any catch-all address.
It is easier to maintain in a large user environment then the virtusertable,
but does have additional overhead checking on the other server. Also mail
will not be accepted when the other server is unreachable or down for some
reason.

Adri.


> -----Original Message-----
> From: Gib Gilbertson Jr. [mailto:gib at TMISNET.COM]
> Sent: 28 January, 2005 12:24
> To: MAILSCANNER at JISCMAIL.AC.UK
> Subject: Re: Reject emails to nonexistent addresses?
>
>
> Hi.
>
> At 11:05 AM 1/28/2005 +0100, you wrote:
> >I think you should be using virtusertable, instead of the access.
> >
> >Access:
> >
> >TO:ourdomain.com        RELAY
> >TO:ourdomain.de RELAY
> >
> >Virusertable:
> >
> >username1 at ourdomain.com !
> >username2 at ourdomain.de  !
> >@ourdomain.com          error:5.1.1:"550 User unknown"
> >@ourdomain.de           error:5.1.1:"550 User unknown"
> >
> >Your mailertable seems alright.
> >
> >Adri.
>
> The easiest thing to do is install and use milter-ahead with
> sendmail. It
> will check ahead to the mail server and accept mail for
> processing if there
> is an account on the other server, and reject if there isn't.
>
> My mail gateway was handling about 35,000 pieces of mail a day with
> virtually all of it being addressed to non-existent users at
> hosted domains
> on other servers. Once I installed milter-ahead and did away
> with catchall
> addresses on the hosted sites this dropped to about 6,000
> pieces a day.
>
> My 2 cents worth.
>
> gib
>
>
>       Gib Gilbertson Jr.
>      Tierramiga Info Systems
>       619-287-8647 Support
>       http://www.tmisnet.com
>       San Diego's "Friendly ISP"
>
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