Unable to ‘reply all’ with smtp.cbeyond.com, server response 4.5.3 Too many recipients

When I try to reply to all the mail does not send and I get this issue.

The message could not be sent. The setting for your outgoing email [SMTP] server might need to be configured. To find the server settings for *** Email address is removed for privacy ***', please contact your email service provider.

Subject 'test'
Server Error: 452
Server Response: 452 #4.5.3 Too many recipients.
Server: 'smtp.cbeyond.com'
Windows Live Mail Error ID: 0x800CCC79
Protocol: SMTP
Port: 25
Secure(SSL): No

Is there something in my settings that needs changed?

It started about 6 weeks ago.

Thanks

Chris

[Original title: windows mail live reply to all issue]