I’m sending emails to customers (and we have a sendgrid api linked to customer.io), but our customers are receiving gmail emails with ‘unauthenticated sender’ which is really detrimentally affecting our open rates.
I’ve authenticated and verified our domain on sendgrid, but also don’t know if this is the sole issue.
I’ve also changed our SPF records from;
include:sendgrid.net ip4:1P Address ~all
But the issue is still happening.