I am now using 4004 and am greatful for the STMP proxy and spam processing. It has reduced the amount of spam dramatically. However I do have one problem. I have the recipient check with call out enabled which cuts down on the junk a lot. I have one customer, a global company whos mail server responds with unknown user error. Is it possible to have a whitelist for domains that the call out will not be performed like the whitelist for spam checking?
Thanks
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