Why is deleting and adding the BT email client the only SMTP fix?

[Callerab]

In outlook.  SMTP just keeps failing. Once it does this for a couple of days, why is the only fix to delete the outlook mailbox and add it again?  Is this a case of connecting to a duff BT mail server? (Nb this is with a fully paid up BT broadband account).

[Ali_A]

Hi @Callerab 

Welcome to the BT Community

If you're able to send emails by logging into your email through the website at BT Email, this would suggest an issue with your email client. 
We don't support 3rd party email clients, so it may be worth checking the Microsoft help pages for support on their service. 

In the mean time, have you tried setting up as IMAP instead? You can find the settings required for this at BT Email server settings
 
Ali