Having HUGE mail problems here too.
Last week, could send mail (still can), but couldnt access the server to retrieve mail over our busiest periods. Had my staff shouting murder the whole day as email was down.
Now today - I can ACCESS the server mail.mydomain.com and login, but NO FRIGGING MAIL COMES THROUGH.... I've even sent myself a test mail and nothing... Can send mail though.
PLEASE - what do I do???
I see that my one mail account is receiving email, but the other domain's email account is not. And trust it to be the domain I REALLY need to access and get email form. PLEASE help.