Error message "4.7.0 [F11-1] Too many messages sent."

I’ve got 2 email addresses registered, but on my primary email I’m getting this message every time I try to send an email. The other email is OK. The emails I’m trying to send are to single recipients with no atachments. Anyone else had this issue?

Hi Larry, this seems to be a server issue, you might have exceeded a maximum message being sent over your SMTP server, please make sure to contact your mail server vendor’s support in order to resolve this issue.

Hope this helps,