Yesterday I configured my DNS with all the data Shopify gives you in order to authenticate the sender email. Then I pressed on "Authenticate" in Shopify and it said "pending authentication".
This morning, I have not access to that section any more, so I don't know if the email has been authenticated. The previous day I had access from Settings-General.
This is Lana from Shopify.
If you are no longer seeing that section, that may mean that you have successfully verified the email. Just in case, I will retrace the steps that you should have taken here so you can see if you went the right way about it. Do note that this is necessary in the case that your domain is hosted with a third party. You should have taken the following steps:
Changes can take up to 48 hours to complete. After your domain changes have taken effect, your domain status is Authenticated.
If you got stuck on any of these steps, please let me know and I will see how I can guide you from there.
Let me know if you have any questions.