%rules-dir%/spam.whitelist.rules

[Alex Neuman]

Would we have to do some sort of custom function in order to whitelist by
PTR instead of IP? I know it's "expensive" from the networking point of
view because a reverse lookup would have to be done every time, but it
could be combined with an "and" so that it only happens under certain
circumstances, I guess.

>
>
> Scott Silva wrote:
>> Alex Neuman van der Hans spake the following on 5/30/2007 10:36 AM:
>>
>>> I'd like to know if, like in:
>>>
>>> From:   1.2.3.   yes # Whitelist everything that *begins with* 1.2.3.
>>> in
>>> its IP Address
>>>
> That will test the IP address of the host sending out the SMTP.
>>> one could:
>>>
>>> From:   *.blableble.com     yes     # ... do the same with everything
>>> that reverse-resolves to something.blableble.com
>>> or
>>> From:   .blableble.com   yes # or this way...
>>>
> That will match against the sender address in the message envelope,
> nothing to do with the IP address that is sending the SMTP.
>
> If you want to match against the SMTP client IP address, you have to use
> the numeric format in your first example.
>> Should work, but will open you up to every spam mail that pretends to
>> come
>> from that domain. But I think the above will only match sub-domains of
>> blableble.com, like server1.blableble.com or otherserver.blableble.com
>>
>>
>
> Jules
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