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PostFix to replay through Exchange 2010?

we have a postfix server that uses SASL and we are trying to relay the box through an eexchange 2010 server but it keeps spitting back errors

(delivery temporarily suspended: SASL authentication failed: server mail.mail.com[] offered no compatible authentication mechanisms for this type of connection security)

This was using an account on the server to authenticate and it still failed...

(delivery temporarily suspended: host mail2.mail.com[] refused to talk to me: 421 4.3.2 Service not available)

server mail2.mail.com is set as a relay with Ip restrictions, the IP's are in the allow list but this error still pops up

I had issues setting up this receive connector in this thread


attached are images for what i ended up having and doing.

Any thoughts on this and what i may need to still set?
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8/22/2022 - Mon

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