I have not been able to reply to any e mails I receive . what is the reason?
How are you accessing your email? From a web browser? From a stand-alone email client? (i.e. - Thunderbird, Outlook, Slypheed)
Where are you accessing your email and attempting to reply? From your home LAN? While on the road (on some other network)?
Are you attempting this out-of-country?
What error messages are you getting (if any)?
We need more information in order to help.