Are you using Norton AntiVirus? If so, disable email protection. According
to Symantec:
Copied directly from: Norton AntiVirus - Knowledge base
http://service1.symantec.com/SUPPOR...nDocument&src=tr&Highlight=0,email,protection
Email Protection:
Norton AntiVirus 2000/2001 includes an email protection feature that scans
email messages and attachments for viruses as they are being retrieved. It
provides an additional layer of protection to Auto-Protect alone, though
your system can be secure without it.
Without email protection enabled, your email program connects directly to
the mail server and downloads the mail. Email protection creates a step in
between; it sets up a proxy server on your computer. Your email program
connects to the proxy server, rather than the mail server; the proxy server
then connects to the mail server, downloads the mail, and scans it for
viruses. Then, and only then, does your email program receive the email.
Because, in this process, your email program never connects directly to your
Internet service provider's (ISP) mail server, it must be configured to
connect to the proxy server instead of the mail server. The address it uses
is as follows:
NAV 2000: 127.0.0.1
NAV 2001: pop3.norton.antivirus
This IP address is known as the loopback address; it simply indicates "this
computer."
Norton AntiVirus also changes your user name. For example, if your user name
is "gsmith" and your mail server is "mail.worldservice.com," then the text
in the program's user name settings box would be changed from "gsmith" to
"gsmith/mail.worldservice.com." When the NAV email proxy server receives a
logon, it divides this back into the user name and the server name, then
connects to the specified mail server.
These are the only changes that Norton AntiVirus makes to your email
program.
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How can you change the settings back?
The easiest way to change the settings back is to disable email protection.
Disabling email protection looks at the user name in your email program,
looking for a / character. It then keeps the settings before the / for the
user name and changes the server name back to whatever was after the /
(after deleting 127.0.0.1 or pop3.norton.antivirus from the server name).
For example, if email protection changed the user name to
gsmith/mail.worldservice.com, and you disabled email protection, then it
would change the user name back to gsmith and the server name back to
mail.worldservice.com.
You can also manually change the settings back; please consult your ISP or
your email program's Help menu for instructions on how to do this.
NOTE: If you do not disable email protection, the settings may be changed
back after certain actions, such as running LiveUpdate. It is recommended
that you disable email protection if you are going to reconfigure your
program.
To disable NAV email protection:
Start Norton AntiVirus and click Options.
Click Email Protection in the Options list.
Depending on your version:
NAV 2000 users, uncheck "Enable email protection (recommended)," and then
click OK.
NAV 2001 users, uncheck the boxes that correspond to the protected email
clients.
Norton AntiVirus will restore the settings, POProxy will no longer load, and
email protection will no longer be enabled on your computer.
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If you disable email protection, is your computer still safe from email
viruses?
Disabling email protection does not leave you vulnerable to viruses and
malicious software in email. It is a separate layer of protection in
addition to Auto-Protect. Auto-Protect scans any incoming files, including
email, as they are saved to your hard drive. As long as you keep your virus
definitions up to date with LiveUpdate, and keep Auto-Protect enabled and
set to scan files as they are created or downloaded, your system is fully
protected.
