I'm involved in a play-by-post, and have it set up to send me emails every time someone interacts with the thread. Both myself and the dungeon master of the PbP stopped receiving notification emails from either our thread or the OOC pm thread around Thursday. I've double checked my settings,  checked the email filters and spam box, but it seems to be a problem on the sites end.

Same here... Thursday a few emails hot put into spam... I white listed them but am still not getting any. 

It is possible your smtp server got slammed as a spam server. You can get this designation by sending to many emails per hour via gmail. 

This should be fixed now.

Thanks!

This was the first notification I got since the problem began. Thanks.