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30/10/2006, 15h58

lekosmoth@yahoo.com wrote:
> Hi,
>
> I am using Mozilla Thunderbird 1.5. It has been working fine until
> today. I can receive e-mails but when I send an e-mail, I receive a
> message that says "An error occurred while sending mail. The mail
> server responded: sender requires authentication. Please verify your
> email address is correct in your Mail preferences and try again."

The server you are using doesnt like what you are doing.

Best guess why: You arent authenticating to it. Check the button which
says authenticate.

However, the only people in the proper position to you are the
administrators of that server. Contact them.

30/10/2006, 15h58	#2
jmaimon@ttec.com Messages: n/a Hébergeur:	Re: Thunderbird Sender Authentication lekosmoth@yahoo.com wrote: > Hi, > > I am using Mozilla Thunderbird 1.5. It has been working fine until > today. I can receive e-mails but when I send an e-mail, I receive a > message that says "An error occurred while sending mail. The mail > server responded: sender requires authentication. Please verify your > email address is correct in your Mail preferences and try again." The server you are using doesnt like what you are doing. Best guess why: You arent authenticating to it. Check the button which says authenticate. However, the only people in the proper position to you are the administrators of that server. Contact them.