David B Funk skrev den 2013-06-03 23:02:
Maybe the lack of Received: headers could be used as the basis for an SA rule. How many legit MTAs are there that don't add Received: headers? Hopefully none.

On 04.06.13 13:26, Benny Pedersen wrote:
imho all mta add atleast one last recieved header, this part cant be abused of spammers, but there is badly writed milters that dont see client ips, this might not be mta fault, but mostly is

some do but after milters are checked. That's why e.g. sa-milter must fake
Received: headers when passing the mail to spamassassin.


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