Cannot send email from IPHONE
I have always been able to send mail from my Apple account on my Iphone until today when it has stopped without me knowingly changing anything.
I have tried turning the Wifi off in case our network guy had been playing with something and a test email I sent a few moments ago has now gone it took ages. Emails sent with Wifi turned on just don't go. I will try this when connected to another wifi network but it's not looking good.
I don't want to reset the phone to factory defaults. I've tried removing the Icloud account - made no difference. Emails sent on the device from other email accounts send without a problem whether connected to wifi or via phone data.
Please note this is on an IPHONE 6 not a MAC.
An error message will popup after a very long time 15 minutes or so, saying "Connection to the outgoing server "p23-smtp.mail.me.com" failed. Additional Outgoing mail servers can be configured in Settings>Mail, Contacts, Calendars"
Any help will be gratefully received.
iPhone 6, iOS 9.2