Posted - 12/10/2018 : 06:50:15
If you're using G Suite for business, there's a main setting related to authentication in your G Suite Account that has one of three choices: - Only registered Apps users in my domain—The sender must be a registered user in one of your domains. - Only addresses in my domains—The sender doesn't have to be a recognized G Suite user, but must be in one of your registered domains. This can be useful when you have third-party or custom applications that need to send messages. - Any addresses (not recommended)—The sender address can be anything, even an address outside of your domain. Here's the article: https://support.google.com/a/answer/2956491?hl=en Sorry to bump old thread but wanted to add the link in case it helps anyone else. Hope everyone is well!! Blair Blair
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