[truemagic]

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

I'm genuinely surprise MXroute made to your unreliable list. So far I'm impressed with their support and performance.