Following is the mail content i got.

Looks like we have a problem issuing your trial of Nintex Workflow 2013,Nintex Forms 2013.

If you made request using a freeware email address, such as gmail or hotmail, this would have caused this problem. Please request trial using your company email address. 

If you made request using your company email address then please reply to this email and let me know when you can have a quick conversation with me to work on a resolution. 

Regards,

Any suggestions.

Thanks,

Ravi