This article is applicable for the users who setup the email services with Google Apps Mail

When the email service has been pointed to gSuite, you will not be able to use

our default SPF record as below: 

 "v=spf1 -all" 

If ever the SPF record was setup incorrectly, then you might receive the bounce back error message

from Gmail indicating on the SPF error where the IP is not allowed to send email from the domain. 

In such, the default TXT record for Google Apps Mail need to setup as: 

v=spf1 ~all"