----- Original Message -----
From: "Laszlo Vagner" <[EMAIL PROTECTED]>
Sent: Thursday, February 20, 2003 4:22 PM
Subject: usernames and aliases etc.

> While hosting mail for several domains, a local user
> with an account name of say "biz" has a domain of say
> "domain.com" would receive mail from other domains hosted
> at the same site such as "[EMAIL PROTECTED]".

Digging back in my memory, I believe, in this case, sendmail will "fall
through" to delivering mail to the underlying user "biz" on your system (if
he exists, of course).

You can prevent that by "terminating" each virtual domain in your virtual
domain aliases (virtusertable); like so:

@domain.com        error:nouser "550 User Unknown"

Do that for all your virtual hosts, and you should be ok. :)

- Mark

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