[north]

Originally Posted by TenFour

My lists:
Reliable: Gmail, Purelymail, Outlook.com (though the spam filtering is unreliable), DuckDuckGo (email aliases and forwarding), iCloud, Onmail, Vivaldi

Unreliable:
Fastmail and POBox.com, in both cases I hit problems getting a domain hooked up knocking me out of email at those domains for more than a week, and with poor and slow customer service response. They also seem to have more temporary outages than most.
Skiff-now gone, but some minor glitches that made me wonder what other glitches lurked.
MXRoute-worst cs in the business

Not sure: Many I have tried briefly, but not long enough to determine whether or not they were reliable

can you please give more details what are the problems with mxroute?