Windows mail won't send "detecting spam"

[Gailmiller]

When I send to an address more than once, I get this message ' Protocol:
SMTP, Server Response: '571 Requested action not taken: Message was spam or
contained virus', Port: 25, Secure(SSL): No, Server Error: 571, Error Number:
0x800CCC61'. It is fine the rest of the time. Is it filters?

 

[Gary VanderMolen]

That's not the whole error message, so I can only offer partial help.
The SMTP mail server you are using has some weird rules, so the
best workaround is to use a different SMTP server.

 

[Frank Saunders MS-MVP IE,OE/WM]

When I send to an address more than once, I get this message ' Protocol:
SMTP, Server Response: '571 Requested action not taken: Message was spam
or
contained virus', Port: 25, Secure(SSL): No, Server Error: 571, Error
Number:
0x800CCC61'. It is fine the rest of the time. Is it filters?

The message is not from Windows Mail, it's from your SMTP server. Take it
up with your mail provider.