Administrators may wish to create an eNewsletter Sign Up form in Sphere. When creating it through Mail Specific Features: Subscription Form, all newsletters show. This solution suggests an alternative to the subscription form, if administrators wish to only have 1 or to have a limited amount of newsletters as options to choose from on a form.
For example, if an admin wishes to only have 1 newsletter on a form, he or she may not wish to use the Mail Specific Features: Subscription Form, because it shows all newsletters as options.
To resolve, the user can create a contact form for the customization of adding on the eNewsletter subscription. This can be accomplished through Forms: Contact > Webinfo Checklist > Customize Forms: Add Ons. Active all preferred newsletters.