Can't send photos via e-mail receiving error message

WHEN I SENT AN E-MAIL WITH NO ATTACHMENTS, IT WENT THROUGH. WHEN I ATTACHED
PICTURES, I RECEIVED THE FOLLOWING 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 'dacardwell@aol.com'. Subject 'Brochure
Pictures', Account: 'mail.threegservices.com', Server:
'smtp.threegservices.com', Protocol: SMTP, Server Response: '554 5.7.1
<dacardwell@aol.com>: Recipient address rejected: Access denied', Port: 25,
Secure(SSL): No, Server Error: 554, Error Number: 0x800CCC79
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smeister