#Outlook email sucks so hard, now I've configured my #own #SMTP out server, as well as SMTP in server, which #relays #emails to Outlook. That's kind of silly, but it works well. Because Outlook is #blacklisting the #IP addresses / #ASN where the primary email relay servers are. And no those servers are NOT sending #spam, nor those servers are open #relays or #abused. But even so, Outlook keeps #blocking those.