handling unknown recipients

[Tilman Schmidt]

Running Postfix with amavisd-new and quarantining attachments seems to
produce an unfortunate interaction when mail with a banned attachment
arrives for an unknown recipient:
Amavis checks the mail for banned attachments before checking whether
the recipient exists.
If $warnbannedrecip = 1 it then proceeds to emit a notification about
the banned attachment to the non-existing recipient, which promptly
bounces to the notification sender address, typically an administrator.
If $warnbannedsender = 1 the sender gets notified that her mail was
quarantined without mentioning that the recipient doesn't even exist.
Neither result is desirable.

Is there a way to validate the recipient address before bothering with
the content of the mail?

TIA,
Tilman

[@lbutlr]

Post by Tilman Schmidt
Running Postfix with amavisd-new and quarantining attachments seems to
produce an unfortunate interaction when mail with a banned attachment

WHya re you ever accepting mail for a user that doesn’t exist?

Post by Tilman Schmidt
Is there a way to validate the recipient address before bothering with
the content of the mail?

Yes, have postfix check for valid users first before passing the message to amavis.

[Tilman Schmidt]

Post by @lbutlr

Post by Tilman Schmidt
Running Postfix with amavisd-new and quarantining attachments seems to
produce an unfortunate interaction when mail with a banned attachment

WHya re you ever accepting mail for a user that doesn’t exist?

Because I do not know how to avoid it in that specific situation.
That's actually my reason for asking that question.

Post by @lbutlr

Post by Tilman Schmidt
Is there a way to validate the recipient address before bothering with
the content of the mail?

Yes, have postfix check for valid users first before passing the message to amavis.

That is indeed my intention. My question was how to do that.

[@lbutlr]

Post by Tilman Schmidt
That is indeed my intention. My question was how to do that.

I don’t know ho you have setup amavis and postfix, but following the setup instructions I don’t seem to have this problem.

[Noel Butler]

Post by Tilman Schmidt

Post by @lbutlr

Post by Tilman Schmidt
Is there a way to validate the recipient address before bothering
with
the content of the mail?

Yes, have postfix check for valid users first before passing the
message to amavis.

That is indeed my intention. My question was how to do that.

This is best for the postfix "users" list, see
http://www.postfix.org/lists.html

... that said... google: postfix smtpd_recipient_restrictions

As a side note, I don't know what you've done, because postfix out of
the box will not do what yours is apparently doing.