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Exchange 2010 SMTP Authentication

Posted on 2013-11-15
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Exchange 2010 SMTP Authentication

We have Exchange 2010 in the network, I am using Thunderbird to connect using IMAP.

I can send email through Thunderbird IMAP , only if I select Authentication "None" for
Outgoing Server (SMTP).

If I select a different type of authentication , I cannot send email

I am not sure how to fix it ?

Thank you
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Question by:jskfan
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by:Nick Rhode
Nick Rhode earned 2000 total points
ID: 39652233
Typically outbound SMTP there is no authentication (Receiving is where the authentication takes place).  This all depends on how your exchange is setup.
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Author Comment

by:jskfan
ID: 39652293
Well.. without Authentication, I can send using Thunderbird from my company email account to another email account inside the company ..
but if I try  to send outside ...I get the error:

An error occurred while sending mail. The mail server responded 5.7.1 unable to relay....
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LVL 22

Accepted Solution

by:
Nick Rhode earned 2000 total points
ID: 39652490
http://kb.mozillazine.org/5.7.1_Unable_to_relay

what port is configured to send out from?
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Author Closing Comment

by:jskfan
ID: 39652563
Thanks ...I will have to configure relay If I need that
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