[Mimedefang] Problem with action_bounce Call

[David F. Skoll]

On Thu, 9 Oct 2003, Fox, Randy wrote:

>             return action_bounce("Message discarded because of suspicious characters in headers.\n");

> The example filter returns action_discard but I've elected to return
> action_bounce instead in an attempt to inform a potential sender why
> the message didn't make it to the sender.  The problem is, the text
> isn't included and all they get is a 5.7.1 550 reject and no
> explanation.

Three possibilities:

0) Take the "\n" off -- you don't want a newline inside a header.

1) Do you have a Cisco firewall between the Internet and your
CanIt box?  Cisco firewalls often attempt to fix^H^H^Hbreak SMTP
in the name of "security" and they hide messages.

2) Is the original sender using M$ Exchange?  Microsoft fixes^H^H^H^H^Hbreaks
SMTP by hiding the text messages and replacing them with their own "improved"
messages.

Regards,

David.