>I can tell you there is significant spam from that Microsoft IP space. That 
>spamcop doesn't have false positives, but rather due to >the sharing of IP 
>space, senders that aren't spammers get tarred with the same brush as the 
>spammers.  I did a grep on the maillog >files and that is a firehose of spam. 

>Up to you of course. I have a few posts on the list trying to whitelist just 
>one sender. 

I agree. My problem is I have a business client that I process mail for, and 
they converted from in-house Exchange to O365.  I was rejecting their email to 
me LOL, not good for the relationship.  And they are losing a lot of their 
customer's mail who are also using O365.  It's become too many to micromanage, 
and their perception is it' smy fault, not M$.  I don’t see much of a way out 
of letting the blacklisted M$ servers "in"/around my RBLs.  FWIW, I've only 
bypassed my RBL checks, what comes in still goes through the rest of the checks 
(spamassassin etc.).




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