Unable to access tinyworld email account through Outlook 365

[sapphy1]

I have been unable to access my tinyworld email account through Outlook (Microsoft 365) since yesterday evening. Am receiving the following error message:

Sending' reported error (0x8004210B) : 'The operation timed out waiting for a response from the sending (SMTP) server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'

[Gondola]

The error message suggests there may be corruption of an Outlook data file and or anti-virus scanning is blocking the sending port. The standard fix is to delete the account from Outlook and set it up afresh and to temporarily pause anti-virus scanning.

IMAP Secure Incoming mail: mail.talktalk.net - Port 993 - Encryption SSL/TLS
SMTP Outgoing mail: smtp.talktalk.net - Port 587 - Encryption STARTTLS