TL;DR: If you haven't been getting mail from the forums for a while, you'll probably start getting them again.

I recently realized that there may be some issues with mail coming from the server getting rejected or filed into junk folders. One of the joys of having your mail server in "The Cloud" is that spammers love to compromise your neighbors' systems and spew loads of spam through them and causes the reputation of the network address space to go down. I just setup a relay through Mailgun and their whole business is mail delivery, so I expect more folks will start seeing emails.