Aloha! I am a New Be, Some times when I go to send a reply I grt a pop 3 Server error Message, can you help me. Thank Very Much

Welcome to AMHD.
Now the more information that you give us the better we are able to help.
What is the error message ?
What operating system?
What e-mail client ?
What colour is the sky ?
Anything else you can think of.