I have the same issue and have been using their service since 2013 and never have had any problems until now.

My last payout was the 1st of February and after that I havn't recieved any verifications emails...

Have my email hosted as an g-suite account and can confirm from their logs that no email ever reaches google;s servers
(Was thinking of emails where being blocked since it always had worked before)

Sent my 3rd email to bit-miner.com today, and still hopes that there are some real problem that they are working to solve