This is the name or IP address of your POP3 server. This is the computer serves your e-mail to your e-mail program.
Some examples:
For Netcom users: pop.ix.netcom.com
For Earthlink users: pop.earthlink.net
If you set your Incoming Server (POP3) to localhost, it means that the program being configured is getting e-mail from your own machine. This can happen for two reasons:
1.
Your e-mail program is getting e-mail from Spam Sleuth in POP3 Proxy Mode
2.
Spam Sleuth is getting e-mail from a gateway program like Web2POP