When you create a new recipe, or edit an existing recipe, when save it you see the following error:
You must enter 1 valid email address.
This occurs if you have set up a recipe to send an email to a specific email address, and entered more than one email address. You can only set a recipe to send an email to one email address.
Remove the additional email addresses. You can then save the recipe and activate it.
If you need a recipe to email multiple people, if they exist as employees, you can select them rather than enter an email address. For example, add a specific employee.
If you need to add an external email address that doesn't exist under a user's Sage HR profile, you can duplicate the existing recipe. You can then amend the email address in the duplicated recipe.