keep getting "errors message" on sending emails

[mmcw]

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 'dbwell (e-mail address removed)'. Subject 'You have
been sent 77 photo(s)', Account: 'POP.charter.net', Server:
'smtp.charter.net', Protocol: SMTP, Server Response: '550 5.5.0 <dbwell
(e-mail address removed)> '@' or '.' expected after 'dbwell'', Port: 25, Secure(SSL):
No, Server Error: 550, Error Number: 0x800CCC79

 

[mac]

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 'dbwell (e-mail address removed)'. Subject 'You have
been sent 77 photo(s)', Account: 'POP.charter.net', Server:
'smtp.charter.net', Protocol: SMTP, Server Response: '550 5.5.0 <dbwell
(e-mail address removed)> '@' or '.' expected after 'dbwell'', Port: 25, Secure(SSL):
No, Server Error: 550, Error Number: 0x800CCC79

You have an illegal space in the email address, after dbwell, remove it and
try again.