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email got "Remote host said: 554 5.7.1 Relay access denied

liyy asked
Last Modified: 2012-08-14

I setup the Ubuntu  10.04 Server, Apache / Postfix / Dovecot / Squirrelmail, everything is ok except receiving emails from outside:

squirrelmail send emails to outside - OK

Outside (e.g. yahoo, gmail) send email to my email server  - not OK

For example, I use Yahoo send testing email to my email server, but bounce back and got following error message:

Remote host said: 554 5.7.1 <xxxxx@<mydomain>.com>: Relay access denied [RCPT_TO]

Is there any settings I need to change in Postfix or squirrelmail?
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