Then your problem is most likely caused by your antivirus.
Trend Micro antivirus is among the top three troublemakers for Windows Mail.
First, go into its settings and disable any interaction with email, then try
Windows Mail again. If no improvement, do a trial uninstall of the antivirus.
Another option (instead of uninstalling Trend Micro) is to upgrade to
Windows Live Mail, which is more resistant to the adverse effects of
overly intrusive antivirus products:
http://download.live.com/wlmail
In any case you must disable any antivirus email scanning, for the reason
explained here:
http://thundercloud.net/infoave/tuto...ning/index.htm
Gary VanderMolen, Microsoft MVP (Mail)
"sharon" wrote in message news:9FCA1154-93F2-450F-88B4-...
the settings were NOT checked. I'm using Trend Micro Antivirus. It never
asked me for a sign in & password before.....why now? How do I get in?
"Gary VanderMolen (MVP)" wrote:
> Go to Tools, Accounts, select that mail account, Properties, Servers.
> Make sure that "Log on using Secure Password Authentication" is not enabled.
>
> If that setting was already unchecked, which antivirus are you running?
> Some of them cause problems with Windows Mail over time.
> Make sure your antivirus is not configured to scan emails.
>
> Gary VanderMolen, Microsoft MVP (Mail)
>
>
> "marcie" wrote in message news:...
>
> Receive the following message when trying to log into email acct.
>
> Any suggestions?
>
>
> Account: 'mail.optonline.net', Server: 'mail.optonline.net', Protocol: POP3,
> Server Response: '-ERR invalid command', Port: 110, Secure(SSL): No, Server
> Error: 0x800CCC90, Error Number: 0x800CCC91
>
>
> .
>