I am using Thunderbird, together with the Mail Merge extension to send emails (sometimes with ~1000 recipients). Thunderbird shows a pop-up alert when there is an error reported from the mail server (e.g. if the email address doesn't exists), and stops sending other emails in the outbox. I would like to know if there is a way to let Thunderbird continue sending emails without checking every now and then whether there is an error. Is there a way to suppress these error messages?