Exchange 2010 (on-premises) + connectors - mail-server not function

Maybe some people know the solution. We have one exchange 2010 with smtp/pop/imap connectors. If we try these with normal client i´ts function. But with the ServiceDesk Plus it´s doesn´t generates tickets. If we click on the mailfetching troubleshooting button, we gets only one blank site.

I hab spent over four days, but i not found the problem, why the program ServiceDesk Plus not received and sent e-mails.
First i follow the manual, but it´s not function, then i check the permissions in AD, Exchange and the machines. But it´s correct. Then i use telnet to check the ports and permission to all machines. After all i test it with an Server from a provider, but i have the same problem.

Thanks,
Toby