Hate to say it butt msy ne nest to blacklist aka block the dis email address until they they get this fixed.
Sounds to me like the recent "upgrade" to the boards (I remember it being down for a couple hours this week during the day) resulted in a problem talking to gmail.com and other mail servers. The "QUIT" being seen in a message tells me the SMTP chat is having problems.
I've got my own server, and no problem seen yet.
??? Your post doesn't make snese?
This hapens to me almost eveyrtime they do an upgrade. Either that or no emails at all. I was wondering if they did an upgrade or not.