Cannot send emails on 2 of 3 accounts

[Norm T]

I have been using Windows Mail for close to a year with no problems. I have
three email accounts. The primary account is fine. The other two accounts I
cannot send emails. I get this error message:The message could not be sent.
The authentication setting might not be correct for your outgoing e-mail
[SMTP] server. For help solving this problem, go to Help, search for
"Troubleshoot Windows Mail", and read the "I'm having problems sending
e-mail" section. If you need help determining the proper server settings,
please contact your e-mail service provider.

The rejected e-mail address was '(e-mail address removed)'. Subject '', Account:
'(e-mail address removed)', Server: 'smtp.comcast.net', Protocol: SMTP, Server
Response: '550 5.1.0 Authentication required', Port: 587, Secure(SSL): No,
Server Error: 550, Error Number: 0x800CCC78
I called my ISP and they said all is fine on their end. I installed
IncrediMail and all three accounts work. Receiving and sending. My PC is at
my home.

 

[Hal Hostetler [MVP-P/I]]

Got an AntiVirus application scanning your email?

Hal
--
Hal Hostetler, CPBE -- (e-mail address removed)
Senior Engineer/MIS -- MS MVP-Print/Imaging -- WA7BGX
http://www.kvoa.com -- "When News breaks, we fix it!"
KVOA Television, Tucson, AZ. NBC Channel 4
Still Cadillacin' - www.badnewsbluesband.com

 

[Gary VanderMolen]

Make sure you have send authentication enabled.
Go to Tools, Accounts, select that account, Properties, Servers.
The box for "My server requires authentication" must be checked.

 

[Fate2073]

I am receiving the same message listed below:

"The message could not be sent. The authentication setting might not be
correct for your outgoing e-mail [SMTP] server. For help solving this
problem, go to Help, search for "Troubleshoot Windows Mail", and read the
"I'm having problems sending e-mail" section. If you need help determining
the proper server settings, please contact your e-mail service provider."
Number: 0x800CCC78

My settings appear fine. I am getting very frustrated.....HELP!!

 

[Gary VanderMolen]

You left off the most important part of your error message.
It should look something like this:

Account: 'mail.comcast.net', Server: 'smtp.comcast.net', Protocol: SMTP,
Server Response: '550 5.1.0 Authentication required', Port: 587, Secure(SSL):
No, Server Error: 550, Error Number: 0x800CCC78

Make sure you have send authentication enabled.
Go to Tools, Accounts, select that account, Properties, Servers.
The box for "My server requires authentication" must be checked.