Hello, I'm also sorry because I used this service.
If I can help you to bring it back, or some ideas for passing abuse
I'll be glad.
Here is a good service to test (DomainKeys, DKIM and SPF) all in one
test.
http://www.myiptest.com/staticpages/index.php/DomainKeys-DKIM-SPF-Validator-test
Best regards,
Adrian Crismaru