> I use qmail and have noticed that the vast majority of spam that comes
> through is from <>
>
> Is there an a means by which I can reject mail from <> or is there any
> problems associated with this?
There is a problem with doing it:
RFC 821, section 3.6:
This notification message must be from the server-SMTP at this
host. Of course, server-SMTPs should not send notification
messages about problems with notification messages. One way to
prevent loops in error reporting is to specify a null reverse-path
in the MAIL command of a notification message. When such a
message is relayed it is permissible to leave the reverse-path
null. A MAIL command with a null reverse-path appears as follows:
MAIL FROM:<>
In other words, that's the "sender" for most bounces, so if you drop
mail from <> you'll be shutting out bounce messages.
--
gowen -- Greg Owen -- [EMAIL PROTECTED]
