deskthority

But we have it set:
http://mxtoolbox.com/SuperTool.aspx?act ... n=toolpage

EDIT: Only for deskthority.net, not server.deskthority.net, added SPF for that too.

Yes, but that's for deskthority.net

My provider seems to check SPF against the SMTP FROM (which is ...@server.deskthority.net) and not the "From:" header in the email.