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e-mailing to a correct e-mail address and it doesn't go through. I get mailer demon reply. How can I fix this?

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For some reason when I send an e-mail to a correct e-mail address, I get a mailer daemon response. I know the address I am sending to is correct. Is there a spam list of blocked e-mail addresses?

For some reason when I send an e-mail to a correct e-mail address, I get a mailer daemon response. I know the address I am sending to is correct. Is there a spam list of blocked e-mail addresses?

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

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

If your problem is with Mozilla Thunderbird, see this forum for support. http://www.mozillamessaging.com/en-US/support/
or this one
http://forums.mozillazine.org/viewforum.php?f=39