Reject emails to nonexistent addresses?

[Tracy Greggs]

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This can all be done from your virtusertable file.  While we do use the
access.db to control relay, we control the nonexistant users from the
virtusertable.

Here is an example:

joe at domain1.com        joe
john at domain1.com      john
webmaster at domain1.com    john
postmaster at domain1.com    john
@domain1.com            error:5.7.0:550 Address Is Not Valid
rick at domain2.com        rick
jeff at domain2.com         jeff
webmaster at domain2.com    jeff
@domain2.com            error:5.7.0:550 Address Is Not Valid


Feel free to email me off list if you need any help.

Tracy Greggs


----- Original Message -----
From: "Rick Gutlon" <rgutlon at YAHOO.COM>
To: <MAILSCANNER at JISCMAIL.AC.UK>
Sent: Monday, January 17, 2005 11:25 AM
Subject: Re: Reject emails to nonexistent addresses?


> Chris:
>
> If you are dealing with a manageable and fairly stable
> list of users another option is to control this via
> sendmail's access.db file. Works great for us smaller
> guys :)
>
> The following convention was suggested by someone on
> this list awhile back which we implemented quite
> successfully:
>
> TO:username1 at yourdomain.com     RELAY
> TO:username2 at yourdomain.com     RELAY
> TO:yourdomain.com               ERROR:5.1.1:550 User
> unknown
>
> The above will accept mail for valid users and reject
> all unknowns before the mail is passed to MailScanner.
> This cut back on a huge amount of overhead for us. The
> last line could be changed from ERROR to DISCARD if
> you wanted the unknowns to hit the bit bucket.
>
> One caveat ... if you use the above you have to
> account for all aliases access file including misc.
> items such as postmaster, abuse, etc.
>
> Just some food for thought ...
>
> --- "Fractal IT Dept." <itdept at FRACTALWEB.COM> wrote:
>
> > Is there an easy way of somehow rejecting emails
> destined to nonexistent addresses before they are
> processed by MailScanner?
>
>
>
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--
Oklahoma Network Consulting has scanned this
message for viruses and dangerous content with
MailScanner, and commercial virus scanners McAfee
and F-Prot and is believed to be clean.
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