I have a Google form that allows users to send a co-worker a digital greeting card but they have to manually enter the email address of the person they are sending it to. The issue is sometimes they might put in
firstname.lastname@example.org instead of
I need a check that will make sure the email address that they provide actually exists in the organization.
Whether this takes the form of suggestions as they type the email (like when typing an email in Gmail) or if there is a script to check it after submitting (I could email the user after to let them know they sent it wrong) either way would work, I just need to make sure the emails exist.