If you have fewer than 2,000 subscribers to your salon e-newsletter mailing list, you can send up to 12,000 e-mails per month for free using MailChimp. Using this e-mail marketing service, you can send your subscribers product updates, event invitations, announcements, or editorial content. Users can pick a pre-designed template or use the e-mail designer to create professional-looking newsletters that even look great on mobile devices. MailChimp allows you to create signup forms that match your brand’s look and feel, and embed them on Facebook or WordPress.