I keep getting a message stating mail undeliverable to emails I have NOT never used or sent to. WHY
This is an automatically generated Delivery Status Notification
THIS IS A WARNING MESSAGE ONLY.
YOU DO NOT NEED TO RESEND YOUR MESSAGE.
Delivery to the following recipient has been delayed:
Message will be retried for 1 more day(s)
すべての返信 (1)
You posted in the Firefox support fora queue. Firefox doesn't do email, it's strictly a web browser.
If you are using Firefox to access your mail, you are using "web-mail" such as Yahoo!Mail or Gmail. You need to seek support from your service provider or a forum for that service.
If your problem is with Thunderbird, let us know and we can move this thread to the Thunderbird support queue.
https://support.mozilla.org/en-US/kb/problems-with-email-how-to-find-help