If you have Bounce Forwarding enabled within your account, you may have experienced some or all of the bounce messages we send going to the spam folder of your Gmail account.
Why is that? When Gmail receives one of our bounce forward messages, it has the tendency to get confused. Specifically, it doesn’t see a corresponding message in the sent folder that relates to that bounce message. It may then decide that the bounce message isn’t valid and send it to spam.
You can get around this by following the instructions below to create a filter that teaches Gmail to behave differently when receiving bounce forward messages from SendGrid.
In Gmail, go to Settings > Filters > Create a new filter
And that’s it! You should now start to see bounce forward messages arrive in your Gmail inbox.