Want to retain your current subscribers and have them help you grow your list? Create unique email content. If your emails are entertaining, informative, and valuable, recipients will always look forward to receiving them and will be more likely to forward them to their networks. This helps you gain exposure and obtain additional subscribe.

Include social sharing buttons and an “Email to a Friend” button on your marketing emails. By doing this, you’ll gain access to recipients' friends, colleagues, and networks to expand your contact list. At the bottom of your emails, include a “Subscribe” CTA as a simple text-based link so that the people receiving the forwarded emails can easily opt-in too.

Email recipients are more likely to click through emails that cater to their specific interests, so using varying types of email subscriptions to send targeted content to different segments of your audience is worth considering. If you create multiple targeted subscriber types, you’ll increase the chance that visitors will subscribe to one of them. In fact, marketers who used segmented campaigns noted as much as a 760% increase in revenue.