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Need help: 550 5.7.367 Sender Not Authorized for Relay
Anyone here experienced this issue? What happened is: email address removed for privacy reasons and email address removed for privacy reasons are perfectly functional individual domains (i own bot...
Be sure to see if that account has any emails forwarding in or forwarding out from the email host side. I had a similar issue repaired when a client had Comcast and had forwarding to Gmail setup, the Gmail wasn't working due to mailbox size, so it gave an error. Might be worth reviewing.