• Open Outlook

  • Select the Send/Receive tab

 

 

  • Select Work Offline to stop Outlook from trying to send all emails

  • Select the Outbox

 

 

  • Move the email to the Drafts folder and move them back one by one to see which is the culprit causing your emails to halt sending

  • Select the Send/Receive tab, and then select Work Offline to de-select it. This restarts your connection.