Not receiving "new post" e-mail notifications

[MarkBC]

This afternoon/evening I haven't been receiving e-mails from WTW notifying me that a new post has been made to topics that I'm "watching" -- usually ones where I've posted.
For example, a new post was made to the "Roof lifting helper..." topic this evening and I didn't receive an e-mail notification, and yet it still shows me as "watching" the topic. Same thing on the "Overland expo..." trip report.

I sent myself an e-mail from an alternative source, and I received it just fine.
So...is something wrong with WTW's notification system?

Anybody else not receiving notifications this afternoon/evening if you usually do?

 

[MarkBC]

FWIW: Something weird really was going on yesterday as I mentioned above.

About an hour ago I received a dozen "new reply" email notifications -- replies that were made to threads from 12 - 18 hours before!

I don't know where the problem was -- if they got stuck leaving WTW or whether they got stuck somewhere in my e-mail provider. However, I didn't have any problem receiving e-mail from non-WTW sources during that period.

Weird.