Hi, Me and my team use Mail Merge for bulk mailing. But we are getting the same connection timeout error every 10 minutes. After that, I need to re-initiate mail merge to send emails. Steps I followed to fix this error:- 1. Increased timeout value of the server mailnews.tcptimeout to 2000 2. Turned off Windows Firewall Antivirus 3. Checked the outgoing server configurations and its correct My email server is Microsoft 365. I am running the latest Thunderbird and Mail merge extension. I cannot understand if this is a Microsoft server error or a mail merge error. Any help would be appreciated.