In your account settings press More Settings... and on the Outgoing Server
tab set it to use authentication and try again.
--
Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more
http://www.msoutlook.info/
Real World Questions, Real World Answers
-----
"Barbara" <(E-Mail Removed)> wrote in message
news:10AE43A6-AE5B-42C4-B9E9-(E-Mail Removed)...
> When I try to "reply" to a message, I get the following error:
> "Your message did not reach some or all of the intended recipients.
>
> Subject: RE: Vision
> Sent: 12/22/2007 5:33 PM
>
> The following recipient(s) cannot be reached:
>
> 'Rick Brown' on 12/22/2007 5:33 PM
> 550 Authentication required. Help at
> http://www.earthlink.net/go/emailsettings"
>
> I go to Earthlink and follow instructions for setting up the e-mail, but
> it
> still does not work. I have a new computer, but it has been working fine
> until the past 2 days. I can't seem to figure out what I need to do to
> "reply" to messages without getting the error messge.
>
>
> --
> BJRogers