whitelisting

[Craig Daters]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Jul 8, 2005, at 9:16 AM, Kevin Miller wrote:
> <snip>
>> It sounds like what you need to do is configure your MTA to refuse
>> mail where the domain in the "From:" envelope is coming from MX's
>> that are not listed in DNS for that domain.
>
> Running sendmail - any pointers on how to do that, and more 
> importantly, any
> downsides?
>
I too am running sendmail, and unfortunately I have no information on 
how to do this. I know that it can be done, but I have yet to find a 
how-to or something similar which explains how. Commenting out the 
option:

FEATURE(`accept_unresolvable_domains')dnl

is supposed to take care of most of that. But it still seems like some 
of this type of crap gets through too.

I have noticed that Postfix seems to have a lot of these kinds of 
features and that it seems relatively easy to configure. I have been 
pondering a switch to Postfix, though I have been using sendmail for 
years and am very familiar with it, so I don't know....

- ---
Craig Daters (craig at westpress.com)
Systems Administrator

West Press
1663 West Grant Road
Tucson, Arizona 85745

(520) 624-4939 x208
(520) 624-2715 fax
www.westpress.com

-----BEGIN PGP SIGNATURE-----
Version: PGP 8.1

iQA/AwUBQs6yRRBVT8XLuTbnEQKIEgCglkdYZmko90kN+/24U6X8TI3pJ3oAoMEN
7+mwC26kqU2EWCnXy6Hqo9d9
=KkuQ
-----END PGP SIGNATURE-----


--
Please note: It is the policy of West Press that all e-mail
sent to and from any @westpress.com address may be recorded
and monitored. Unless it is West Press related business,
please do not send any material of a private, personal,
or confidential nature to this or any @westpress.com
e-mail address.

This message has been scanned for UCE (spam), viruses,
and dangerous content, and is believed to be clean 

------------------------ MailScanner list ------------------------
To unsubscribe, email jiscmail at jiscmail.ac.uk with the words:
'leave mailscanner' in the body of the email.
Before posting, read the Wiki (http://wiki.mailscanner.info/) and
the archives (http://www.jiscmail.ac.uk/lists/mailscanner.html).

Support MailScanner development - buy the book off the website!