Hi,

Getting this error on sending a mail to external mail IDs from Outlook for Mac.

ERROR_CODE :550, ERROR_CODE :5.7.1 This message does not have authentication information or fails to pass

5.7.1 authentication checks. To best protect our users from spam, the

5.7.1 message has been blocked. Please visit

5.7.1   https://support.google.com/mail/answer/81126#authentication for more

5.7.1 information. q88si5315853pfa.222 - gsmtp