POP3 Mailbox Full: How to purge deleted emails from the server?

Nebo7 wrote:

I'm not receiving emails from my POP3 mailbox because it is full. I have deleted all unwanted emails and emptied the Bin folder on my device but I believe that with a POP3 system, the emails all remain on the server. This is causing a bounce response to go out to anyone that sends me an email, with an "Undeliverable - Mailbox Full" message. How can I purge my deleted emails from the server so that it will start allowing me to receive my emails again?

[Re-Titled by Moderator]

Original Title: POP3 Mailbox purge

POP3 normal configuration downloads email from the server to your computer then deletes the email from the server. IMAP protocol keeps a copy of the email on the server. If your email server is full, log into your email provider's site through their webpage and delete the email from their server.