Sending, receiving, and organizing email in Outlook.com
Dear Richard Trott,
Thank you for posting in Microsoft Q&A Forum.
To ensure your case is handled as quickly and efficiently as possible, the most direct way to have a closed case like this officially reopened and actively worked on is by contacting the support team again.
Please contact Support Team directly and refer to your old case number from your earlier chat today. They will be able to process the request to reopen the case and resume troubleshooting your outgoing email issue immediately.
You can usually find the best way to contact support on our website's 'Contact Us' or 'Support' section.
I appreciate your patience and look forward to resolving this issue for you quickly.