IOS 16.3.1 Suddenly mail can not send, error ’the sender is not valid’ How to fix this?
Suddenly I can not send email anymore iPad 16.3.1 (update did not help.)
error says: the sender is not valid.
what??????
the Mail function used to work without problems for years and I did NOT CHANGE anything.
And yes, I checked all settings again, had filled in all the fields.
And yes, I restarted, logged out of iCloud and back in again.
anybody out there with a solution?
thank you ….!