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@useronym
Created March 18, 2019 13:57
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cannot execute command MAIL "noreply@domain", expected reply code 250, but received 550 5.7.1 Invalid credentials for relay [209.97.189.45]. The IP address you've 5.7.1 registered in your G Suite SMTP Relay service doesn't match domain of 5.7.1 the account this email is being sent from. If you are trying to relay 5.7.1 mail from a domain that isn't registered under your G Suite account 5.7.1 or has empty envelope-from, you must configure your mail server 5.7.1 either to use SMTP AUTH to identify the sending domain or to present 5.7.1 one of your domain names in the HELO or EHLO command. For more 5.7.1 information, please visit 5.7.1 https://support.google.com/a/answer/6140680#invalidcred g16sm147014edp.38 - gsmtp
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