Gmail SMTP relay service errors
Posted by Sinclair Hughes, Last modified by Sinclair Hughes on 09 May 2022 08:38 AM

Advanced email routing through the Google Gmail servers

https://support.google.com/a/answer/6140680#invalidcreds6-20020a17090302c600b0015eca1bc518sm78521plk.143%20-%20gsmtp

SMTP relay: Route outgoing non-Gmail messages through Google

If your organization uses Microsoft Exchange or another non-Gmail SMTP service, you can configure the SMTP relay service to route outgoing mail through Google. You can use the SMTP relay service setting to filter messages for spam and viruses before they reach external contacts. You can also apply Google Workspace email security and advanced Gmail settings to outgoing messages

https://support.google.com/a/answer/2956491