Email node failing with below error “ Client does not have permissions to send as this sender”

Email node failing with below error “ Client does not have permissions to send as this sender”

we have requirement to send the custom email sender for business. So, we configured in below properties files and able to see new drop-down values in email setup. But run time email node is failing.

This setup is working fine in Dev but failing in QA environment.

Email constant updated with correct email address.

/email-address-config-custom_en_US.properties

---------------------------------------------------------------------

address.ImplementationTeam.displayName=HR Team

address. ImplementationTeam.emailDisplayName=HR Team

/email-address-config-custom.xml

--------------------------------------------------------

<address name="ImplementationTeam">

<expression>=toemailaddress(cons!IMPLEMENTATION_EMAIL)</expression>

</address>

<item>ImplementationTeam</item>