I have a form I need to send. The server is a windows server. I'm sending from internet host back to enteral exchange server. When I submit the form I get the following error. My IT guy said I need to authenticate the user. when I do I still get the error message. What am I not getting?

error: Warning: mail() [function.mail]: SMTP server response: 550 5.7.1 Message rejected as spam by Content Filtering.

 ini_set("SMTP", "mail.mydomain.com");
 ini_set("sendmail_from", "me@mydomain.com");
 ini_set("username" , "myusername")'
 ini_set("password", "mypassword");
 ini_set("SMPT_PORT" , "25");

2 things:

1) It's SMTP, not SMPT.
2) If that still doesn't work, you'll need to try different email messages. The error you're getting is indicating that something about your emails is triggering a spam script to indicate that your email is spam, so try a purely text message.

Will do. thanks for the info.

Ah, I had my IS Guy create a new email addess for me. He had the levels set as a 9. Anything 9 and above is marked as spam. The new email address is marked as a 7. Works great now. Plus I didn't have to do the ini_set. If you want to know more what I did hit me up with a private message.