On 04/19/2010 12:53 AM, mohamad rahimi wrote:
> a email. we receive this error Unable to authentication to SMTP
> server .... however , it is possible to send email without
[...]
> The error is Mail server responded
> 5.7.1 ... 

It seems like you are replacing the most important part of the error
messages with "..." above.  You'll almost certainly want to include the
full text of the error messages, as they likely say what is going wrong.

You probably also want to look at the logs on the server when this happen.
They may have more information on what is failing and why.  This is often
in /var/log/maillog or /var/log/mail.log on Linux systems.

Sean
-- 
Sean Reifschneider, Member of Technical Staff <j...@tummy.com>
tummy.com, ltd. - Linux Consulting since 1995: Ask me about High Availability

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