Thread subscription e-mail notifications broken

[mb1685]

E-mail notifications for thread subscriptions no longer appear to be coming through. Doesn't appear to be related to spam folder settings (no BaseOps/FlyingSquadron emails showing up there in my Gmail).

In case it helps, the last notification I received on my subscribed thread was on December 4th and there were new posts starting on December 6th which didn't seem to generate e-mail notifications.

Issue replicated by @M2 in this thread.

[mb1685]

Just got an email notification — issue appears to be resolved.