Add a DMARC record. More S4!T you should already know.

Source: Add a DMARC record – Google Apps Administrator Help

 

Additional Sources:

https://wordtothewise.com/2014/04/brief-dmarc-primer/

 

Leave a Reply

You can use these HTML tags

<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>