Knowledgebase

First, check to see if your disk space is full.  You can see this from your control panel.  If it is, you need to clean off some space or purchase more.  You will NOT receive email, or it will be sporadic if you do not have any disk space to write the email to.  Folders to check are: stats (delete the 200x folders if you don't use them anymore), mail (are you saving copies on the server, either knowingly or unknowingly?), spam files, and webmail trash (empty it regularly!)  Also, check your mail settings to be sure your mail client is set up correctly.

If it's OUTGOING email that is not working, that is your ISP, you will have to contact them for support.