Can't send- doesn't support authentication: Road Runner

Hello all,
I have a new Mac Book Pro and it won't accept the settings I am entering in Mail.
Mail automatically set up the first Road Runner (RR) account no problem and retrieved old mail from server but it wouldn't let me send mail or get mail soon after that.
I am getting "doesn't support authentication" message and have changed that setting with no luck. Also message of can't connect to SMTP server.
Anyone know if I should check SSL, which authentication I should check,
in prefs> acct> the 2nd line of info RR Pop is greyed out.
I know my passwords are right I copied them over from other 2 computers on my network that are getting mail and sending just fine. But who wants to use a G4 imac and iBook:)
Obviously I have a setting wrong.
thanks,
Al

Hi,
What Authentication are you using on this SMTP? If not already, try using None, and removing Password and Username from SMTP setup for at least one test. Most Roadrunner SMTP are authenticated by reference to the IP address of your Modem, and using a separate authentication of the SMTP results in failure.
Mail Preferences/Accounts/Account Information, then click on the arrows beside the name of the SMTP in the section on Outgoing Server. After you click on the arrows, choose Edit Server List. Then if the SMTP is set up with the correct name, etc, click on the Advance Tab, use Custom Port with Port 25, None as authentication, and do not enter any Username and Password. Under authentication of None, the name of the SMTP will not have your Username appended.
Let us know, but Roadrunner can vary from area to area on this, but this is the way it seems to always work.
Ernie

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