NET-POP3-CLIENT-P-P1-SINGLE is a uC/POP3 Post Office Protocol version 3 client module with single product license. It is an add on application layer protocol to uC/TCP-IP. Post Office Protocol version 3 (POP3) is an e-mail protocol. POP3 allows an email client to download an email from an email server. The POP3 protocol is simple and does not offer many features except for download. Its design assumes that the email client downloads all available email from the server, deletes them from the server and then disconnects. POP3 client establishes a TCP connection to the server, using Port 110 and supports basic functions (download and delete) for e-mail retrieval. To receive e-mails it is the most popular service used.