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I cannot send email to hotmail or road runner addresses

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Recently, as I forward or return emails to "Hotmail" or "Roadrunner" email addresses, they are returned as undeliverable. This has only started in the past three days. I cannot find a reason for or solution to this problem.

Recently, as I forward or return emails to "Hotmail" or "Roadrunner" email addresses, they are returned as undeliverable. This has only started in the past three days. I cannot find a reason for or solution to this problem.

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Firefox doesn't do email, it's a web browser.

If you are using Firefox to access web mail, you need to seek support from your service provider or a forum for that service.

If your problem is with Thunderbird, see this forum for support. http://www.mozillamessaging.com/en-US/support/

or this one

http://forums.mozillazine.org/viewforum.php?f=39