yea, most smtp providers will take care of all that for you.
You can also enter feedback loops by yourself, if you are running a vps/dedicated server.
I beleive there are separate feedback loops for the various larger email providers out ther though, (Microsoft, AOL etc).
There are not many fbl processing out there,really.
Only ESPs process your complaints if you use their service.
Otherwise,you will have to code it from scratch.
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