About watermarks

[Julian Field]

Charles Lacroix wrote:
> Mark Nienberg a écrit :
>> Charles Lacroix wrote:
>>> Hi,
>>>
>>> I had this configuration which reduced alot of bounces going into 
>>> user's mailbox.
>>> I was quite happy with this but today some users noticed that 
>>> gmail's vacation messages
>>> were beiing blocked.
>>>
>>
>> The watermark feature examines all messages that have a null sender.  
>> In sendmail logs these are the ones with:
>>
>> "from=<>"
>>
>> If gmail uses that approach to send vacation messages, and does not 
>> include the original message in the reply, then it will trigger the 
>> bad watermark action.   So if you want to be able to receive these 
>> and still use the watermark feature, maybe you could just add 2 or 3 
>> points for a bad watermark.
>>
>> Mark
>
> As i said in the original post, i tried setting a few points to it and 
> it would mark it as spam and not check via spamassassin at all.
>
> Could i just build a ruleset like this:
>
> Check Watermarks With No Sender = rules/check.watermarks.rules
>
>
> From:  *.google.com   no
> From:  default  yes
>
> mail comes from hostnames similar to this: 'qb-out-0506.google.com'
>
> Sould this work?
No, as that "From:" will check the sender address and not the SMTP 
client IP address. The only way of forcing it to check an IP address is 
to put in the netblock definition of their outgoing IP addresses.
> Thanks
>
>

Jules

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