Chronoform Emails marked as SPAM

I need help with my E-Mail. I created a formular. All works well. But the email is permanently marked as SPAM. It is funny. One adress works well. Another not. I tried all tipps: same domain as website, edit whitelist by provider, use different emails for send and receive, ... I know, that Chronofroms is not the problem. But perhaps there a any ideas? My customer is not amused!
The Link: http://ebz-mtk.de/index.php/material.html
Thanks for help!
Debbing

Hi Debbing,

Are these emails to the Site Admin or to the User?

Have you asked the mail service provider what the problem is?

Please drag a Debugger action into the On Submit event, then submit the form and post the debug - including the 'dummy emails' results here.

Bob

Hi Bob,
the problem had been mails to Site Admin. but the solution is independent from Chronoforms! The junk mail filter of the MAIL PROGRAM had been too strict. Chronoforms is innocent and best formular I know!
Debbing