Just installed MS Outlook '07. Unable to send messages.

[Louie]

Hit send/reply button; Received message undeliverable with following error
message: 550 please configure mail client to use authentication. Don't know
what this means and/or what to do. Please help.

 

[Orland, Kathleen]

You have to set up your mail account to submit a password to both your POP3
and SMTP servers.

 

[Duncan McC]

Hit send/reply button; Received message undeliverable with following error
message: 550 please configure mail client to use authentication. Don't know
what this means and/or what to do. Please help.

That's a message back from your email server (probably also your ISP).
Contact those folk to find out what details you need to connect to their
server (they *may* use some "non-standard" ports and settings too, such
as SSL encryption). But if you check with them (perhaps they have a
good support page you can browse to?) - they'll give you all the guff
you need.

 

[Orland, Kathleen]

You should be able to find all the settings you need detailed on your ISP's
web page.