GMAIL - Relay access denied

Hello Expert Exchange community,

Would appreciate any input on the following issue:

Email gets bounced back with the "554 5.7.1 Relay access denied" when sent from to our domain.
Our email hosted internally on Exchange 2010 server behind SoniWall Email Security 300 appliance.

Has tested email delivery from multiple domains with no issues.

Email gets delivered with no problem when tested with TELNET connection to Sonicwall box.

Thank you
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Is the bounce from the Sonicwall or the Exchange server?

Are you trying to use your Exchange server to forward mail from gmail via smtp?
TWM_TECHSAuthor Commented:
Thanks for the reply Carlmd.

Based on the error the email gets rejected by the Sonicwall ( (see the bounced back message in the attachement).

I'm not forwarding email from gmail. it's jut non of email from gmail gets delivered to our domain.
Did this ever work with gmail? If so, what if anything has changed, either on Sonicwall config or other?

Is the gmail email being rejected when sent by any sender, or just this one person?
TWM_TECHSAuthor Commented:
Yes,  messages sent via gmail were last received as late as March 3rd.

all messages sent by gmail get bounced
Did anyone change any of the rules on the Sonicwall when this started?

It is most likely that is the cause. Even if you don't think they changed I would look for a rule that blocks gmail (in the headers or from).

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