Changes to Send Email Action for Guest Users

This change was enforced in the Summer 25 release to the Send Email Action inside flow and it broke the Unsubscribe Link app.

When the running flow user is the guest user, the Sender Email Address must be set to a verified organization-wide email. Emails sent from the guest user and not using a verified organization-wide email are blocked.

—-Salesforce documentation

A guest user is someone not logged into your Salesforce instance, but they got a link to a flow and are running it from the URL. If the flow sends an email using the old default of running user, the flow now breaks. This may not impact you, but if it does, I’m sorry.

This isn’t the only thing broken about the Unsubscribe Link after the Summer release….

Steps to Update the Unsubscribe Link (or any flow with this problem)

If you’re using this for guidance to update another flow, the names of the elements will be different.

1. Set up an Organization-Wide Email address. Instructions here.
   • Profiles: Allow All Profiles to Use this From Address 
     • You can select any of the “purpose” options but you may want to read more about that if you will reuse the org wide email address.
     • Make sure you verify it.
2. Edit the Unsubscribe Link flow.
   • Open it by searching for Flows in the setup menu, then Unsubscribe Link.
3. Update your Send Email action elements.
   • Find the blue action square in the middle called Send Error Alert Email.
   • Click on that to edit. 
   • Under Configure Sender Details, select Sender Type is OrgWideEmailAddress.
   • Type in the email address you just set up as an org wide email address.
   • Click Done.
4. Update the ConfirmationEmail action element using the same procedures as in step 3.
   • If you do not use the confirmation email (you have toggled it off in the Custom Metadata types), you can skip this step.
5. Save and Activate the flow.
6. Test it out by creating a contact or lead with your own email address and sending yourself an email with the Unsubscribe Link.

I am so sorry for the disruption this caused to your organization and businesses!

Continue updating the Unsubscribe Link for Summer 25 changes here!