We switched from a DSL ISP to comcast cable - moving DSN's for domains yesterday.

I stopped getting notification e-mails from the forum.

I've tested that I can send e-mails to my domain e-mail account from gmail and other e-mails I've got access to.

I've checked that my USER CP settings for e-mail are that same domain account.

I've even found a post I made and clicked on szlamany to send myself an e-mail from the forum - it never went through.

Why?