Apparently there is a problem with Verizon's new email setting and MS Entourage. After making the changes the following error message appears.
Authentication failed because Entourage doesn't support any of the available authentication methods.
Could not retrieve mail.
I had the same issue. I just fixed it myself accidently. I went into the email account setting, where we changed the ports etc. I clicked on the mail security tab at the top and under "encryption" I checked the box for "encrypt outgoing messages and attachements by default" and my entourage email finally worked.