Why don't I get Paceline Notification e-mails?

[Gartenmeister]

OK, so I have been having this problem for months now, but kept thinking it would resolve itself. It hasn't. Anyone else experience this?

The problem is I no longer receive e-mail notifications of any sort from Paceline. I should be getting them for both private messages and subscribed threads but I get neither.

I used to receive the e-mails with no problem.
I did not change any settings.
Yes, I have checked my spam folder.
Yes, I have checked to be sure Paceline has my correct e-mail address.
Yes, I have "Receive Email Notification of New Private Messages" checked.
Yes, I have "Instant e-mail notification" selected for subscribed threads.

Seems like the problem is beyond me. Or am I missing something?