I have a Nokia Lumia 710 running WP7.5.
I recently moved my mail server and ever since then the 4 email accounts (different domains) won't sync email. I get this message: "The certificate from mail.mydomain.co.nz is not valid. Do you want to continue?"
If I click continue the message pops up 2-3 seconds later in a constant loop so I can't check mail.
As far as I know nothing is wrong with my mail certificate, emails have worked fine on Windows Live Mail, Thunderbird and my Android phone since the change over.
I have tried deleting and adding the email accounts again in WP7 but that didn't help. The problem occurs on WIFI and 3G.
Does anyone have any ideas I could try, is their an alternative WP7 email client?