Learn how to prevent outgoing spam in Google G Suite with DMARC. Google is a key DMARC standard participant, thankfully, as a significant percentage of all email traffic passes through Google’s email infrastructure.
Given Google’s DMARC support, implementation of the DMARC email authentication protocol is a no-brainer and will help you regain control over spammers spoofing your email, who do this by impersonating your “From:” email address.
Learn more about DMARC for Google G Suite by clicking this link: https://support.google.com/a/answer/2466580#
Then to learn how to add DMARC to your business email domain, go here: https://support.google.com/a/answer/2466563?