Internet PC Networking

The Post Office Protocol version 3 (POP3) as defined in RFC1939 is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. The protocol defines how the server responds to requests sent from an e-mail client.

A POP3 mail server receives e-mails and filters them [...]

Following are the steps to attach photos or files in your email and send it to your friends. I will use Hotmail in this case.
Step 1:
In Hotmail interface, select New and compose your email. Select File from the Attach.