Emails not sending from iphone

[johncollins]

My iphone suddenly stopped sending emails from my BT account, message says my username or password are incorrect.  However I haven't changed password and I am receiving emails and also able to send & receive from my ipad and the web browser.  I have tried deleting the account and reinstalling it on my iphone but getting the same error message.  Any ideas how to fix this?  

[gg30340]

Are you presently a BT Broadband customer or are you paying for your email through a BT Premium email account?

If neither of the above your email account may have been downgraded to a BTMail Basic account which can not be used with an email client and it will stop on your other devices soon if that is the case.

See link

https://www.bt.com/help/email/bt-email-products

[johncollins · Accepted solution]

I do have a BT Premium email account.  Weirdly it has now started working again.  Thanks. 

[gg30340]

It was probably an email server problem that has been resolved.

If it happens again the best advice is to do nothing especially do not delete the account or change your password as this can cause more problems than it solves.

If it happens again try and access your account via webmail (using a browser). If your account works when you do that it proves there is nothing wrong with your password or account and the issue is not at your end hence the advice to do nothing.  Most server problems are resolved quickly and in any event within a day or two.