From: List Address (jeff-listsposluns.com)
Date: Mon May 19 2003 - 13:43:03 CDT

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Or you can use the verify_domain restriction class as described here:
http://www.securitysage.com/guides/postfix_uce_class.html

/jeff

On Monday, May 19, 2003, at 02:22 PM, Noel Jones wrote:

> On Mon, May 19, 2003 at 11:26:19AM -0400, Toll, Eric wrote:
>> To use this new restriction name selectively, simply create a file
>> called
>> (for example) sender-validate that looks like:
>>
>> hotmail.com reject_mismatched_sender_domain
>> yahoo.com reject_mismatched_sender_domain
>> excite.com reject_mismatched_sender_domain
>> ...
>> and then use the postmap command to compile that into a
>> Postfix-compatible
>> fast-lookup .db hashed data base: postmap sender-validate
>>
>> Then finally, just add your new sender validation data base to your
>> existing
>> list of Postfix smtpd_sender_restrictions in your main.cf
>> configuration
>> file: smtpd_sender_restrictions = ...
>> hash:/etc/postfix/sender-validate ...
>>
>>
>> Anyone care to post to the list a bigger/longer list of domains
>> worthy of
>> applying the above check to?
>>
>> TIA.
>> Eric.
>>
>>
>>
>
> the big list is here:
> http://www.monkeys.com/anti-spam/filtering/sender-domain-validate.in
>
> Note that reject_mismatched_sender_domain is a patch against rather old
> postfix 20010714 and won't apply to current versions. I don't know of
> any updated patches for this unofficial feature.
>
> However, this list is still useful for people using current postfix
> versions. Use it like this:
> smtpd_sender_restrictions =
> check_sender_access = hash:/etc/postfix/strict-sender
>
> where strict-sender is the above mentioned sender-domain-validate.in
> list edited so it looks like:
> aol.com reject_unknown_client, reject_unknown_hostname
>
> This will reject lots of spam, and doesn't require any patches.
>
> --
> Noel Jones
>
>

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