On Fri, 8 Feb 2008, Raimo Niskanen wrote:
>Now I am trying to improve the Greyscanner. I noticed it did not
>trap hosts using an empty envelope sender, unless there were
>more than one entry from that host. I regarded it as a bug
>and fixed it. I hope an empty envelope sender really
>is suspicious or disallowed.
Read the RFCs rather than guessing. 'Mail From: <>' is not merely
allowed but is _required_ when a delivery-failure message is sent.
You're throwing away most legitimate notifications of errors delivering
messages which originated on your server.
Dave
--
Dave Anderson
<[EMAIL PROTECTED]>
