UPDATE: We are now routing email destined for verizon via an alternate route.
Verizon has been blocking our email forwarders since shortly after the migration.
We have entered numerous requests to be unblocked and we have been attempting to establish contact with somebody clueful over there via backchannels, so far no luck.
Impacted customers are encouraged to open a ticket with Verizon and request whitelisting of the new ZoneEdit mail forwarders:
You can also use your mail forwarding abilities to simply forward your email to another destination.
Of interest: easyDNS offers email hosting with it’s domain packages, see this for more info.