Wietse Venema schreef op 8-1-2014 20:47:
R. Berger:
It's not exactly a catchall.
@domain.nl        %[email protected]
means that [email protected] is send to [email protected]
I wrote that you will accept mail for non-existent recipients in
otherdomain.nl.

That is bad.

Your system will be sending backscatter mail to innocent people.

        Wietse

Why is that? Otherdomain has 29 users
In sendmail, when I use "@domain.nl %[email protected]" domain.nl wil automatically have 29 users also. If there is a mail send to [email protected] and [email protected] does not exist, it will be rejected. In postfixadmin this will be a domain alias but that isn't working with local virtual users.

Roger

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