I have been getting this message lately, how do I "authenticate" ?
To turn SMTP authentication on or off:
If your POP or IMAP mail server requires SMTP authentication when you send
messages, you can set up special logon information for that purpose. You can
choose whether to use the same account ID and password you use for receiving
messages or specify different ones.
1. On the Tools menu, click Accounts.
2. On the Mail tab, click the IMAP or POP account, and then click Edit.
3. On the Account Settings tab, click Click here for advanced sending
options, and then select or clear the SMTP server requires
authentication check box.
4. If you want to specify different account ID and password information,
click Log on using and enter your information.
