From: Brian Evans - Postfix List (grknightscent-team.com)
Date: Mon Aug 04 2008 - 13:40:54 CDT

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Nicolas KOWALSKI wrote:
> On Mon, Aug 04, 2008 at 12:29:34PM -0400, Brian Evans - Postfix List wrote:
>
>>> A *better* way is force them to Authenticate using SASL.
>>> See http://www.postfix.org/SASL_README.html
>>> Postfix supports either Cyrus or Dovecot SASL.
>>>
>>>
>> P.S. This is if you fully trust and know this host
>>
>
> Yes, I fully trust this host. Actually, it is the mx backup for my home
> server:
>
> $ host petole.dyndns.org
> petole.dyndns.org has address 87.90.240.206
> petole.dyndns.org mail is handled by 10 demisel.dyndns.org.
> petole.dyndns.org mail is handled by 5 petole.dyndns.org.
>
> Can I use authentication for MX?
>
>
I would highly recommend setting SASL up on both ends in this case. This
is much more secure and reliable than whitelisting a dynamic host.
See the above link for details.

If you implement this and have problems, please post logs and new
'postconf -n' to this list.

Brian

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