Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Buscar en Ayuda

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Luke: Thunderbird 3 not sending my emails!

  • 2 respuestas
  • 0 tienen este problema
  • 7 visitas
  • Última respuesta de Chris Ilias

more options

Sending of message failed. An error occurred sending mail: Unable to authenticate to SMTP server smtp.east.cox.net. It does not support authentication (SMTP-AUTH) but you have chosen to use authentication. Uncheck 'Use name and password' for that server or contact your service provider.

Troubleshooting information

Sending of message failed. An error occurred sending mail: Unable to authenticate to SMTP server smtp.east.cox.net. It does not support authentication (SMTP-AUTH) but you have chosen to use authentication. Uncheck 'Use name and password' for that server or contact your service provider.

Sending of message failed. An error occurred sending mail: Unable to authenticate to SMTP server smtp.east.cox.net. It does not support authentication (SMTP-AUTH) but you have chosen to use authentication. Uncheck 'Use name and password' for that server or contact your service provider. == Troubleshooting information == Sending of message failed. An error occurred sending mail: Unable to authenticate to SMTP server smtp.east.cox.net. It does not support authentication (SMTP-AUTH) but you have chosen to use authentication. Uncheck 'Use name and password' for that server or contact your service provider.

Todas las respuestas (2)

more options

This forum is for Firefox support, not Thunderbird support. The best place to go would be http://www.mozillamessaging.com/en-US/support/

more options

I have moved from outlook to thunderbird it imported and finished correctly i can not send mails to any of my contacts can u guys please help