[Mimedefang] Sendmail 8.14.0 Beta available

[WBrown at e1b.org]

Joseph Brennan <brennan at columbia.edu>  wrote on 01/04/2007 12:29:03 PM:

>    CONFIG: New FEATURE(`require_rdns') to reject messages from SMTP
>                 clients whose IP address does not have proper reverse 
DNS.

Do they define "proper reverse DNS"?

>         CONFIG: New FEATURE(`block_bad_helo') to reject messages from 
SMTP
>                 clients which provide a HELO/EHLO argument which is 
either
>                 unqualified, or is one of our own names (i.e., the 
server
>                 name instead of the client name). 
>    CONFIG: New FEATURE(`badmx') to reject envelope sender addresses
>                 (MAIL) whose domain part resolves to a "bad" MX record.
>                 Based on contribution from William Dell Wisner.
> 
> 
> All of these are a little dangerous.  Notably, an smtp server should
> accept mail with bad HELO strings from clients.


Yes, anything that blocks any email caould be considered a little 
dangerous because some email some (L)user wants was blocked.  Just like 
ORDB blocking open relays blocked legitimate mail from misconfigured mail 
servers.  But it forced people to clean up their server configs.  I think 
these new options will do the same.  And that's a good thing.