Hi can’t send or receive E mails but can access existing & old E mails

[Norma7]

Emails stopped working no new ones & can't send any but can access all old ones 

[Mark39]

Can you see your up to date Inbox by logging in online here: https://www.sky.com/signin/email

If so, are you using an email app to access your emails? Which one? On what device?