Hi there.
Do MS have a default blacklist that used on all 365 email a/c's
If so, do MS have a site to do a blacklist check . Ive seen links to blacklist removal forms , but no check tool
Ive looked in the more common Blacklist check sites, they all came out clean for this particular sender (email adress) . Not sure if
MS use any of those or they have their own .