Can't access email...New Problem

I can't access email. I get the following message:
LGI-0006 Categories=USER_INPUT Message='Invalid credentials.' exceptionID=812638250-36901966
I logged in to web site to access email (manage email) and was sent to another web site (of mine).

CANNOT READ EMAIL FOR MY EMAIL ADDRESS: nickmarlin@nickmarlin.com

I read the "EXTREMELY IMPORTANT DOMAIN INFORMATION" posting but can't get to email to update and can't get to email to complete verification.

Please help. I manage multiple websites on homestead.