Heiko Schlittermann wrote on 18.08.2005 0:35:
> Hello out there,
>
> [ exim 4.51 ]
> in our environment we deliver messages via LMTP (via socket)
> to the cyrus mail system. From time to time mails bounce with
> quite unspecific error message:
>
>
> This message was created automatically by mail delivery software.
> A message that you sent could not be delivered to one or more of its
> recipients. This is a permanent error. The following address(es) failed:
> xxx@localhost
> (generated from xxx@???)
>
>
> Looking for the Message-ID I found in the log file:
> "LMTP error after end of data: 554 5.6.0 Message contains NUL characters"
>
> I'd like to return this error to the sender. How?
If you don't want do accept such messages at all you can reject them in
the acl_smtp_data section before any routers or transports. For example
# Check for NUL characters
deny message = Body contains $body_zerocount NUL charcter(s)
log_message = Message denied, \
body contains $body_zerocount NUL charcter(s)
condition = ${if >{$body_zerocount}{0}{1}{0}}
> Best regards from Dresden
> Viele Grüße aus Dresden
> Heiko Schlittermann
hjb :-?
