Email marketing has been around for decades, but the strategies have only become more complex. A successful email marketing strategy isn't as simple as sending out a great deal via email, though that's one component of it. It's about offering value to the customer and continually revamping your strategy for the best results. If you want to see growth in your email marketing strategy, give these growth hacks a try.

1. Collect Addresses Everywhere

If you're doing it right, you already have a form on your blog that'll collect email addresses, but you can also find them all over the Internet. Big data collects more email addresses than you can imagine, and they're at your disposal if you know where to look.

Use pop-up forms and interstitial ads to accumulate even more addresses when people visit your website. You can also collect them on social media platforms. By using a Lead Generation Card on Twitter, for example, you can gather email addresses for free.

2. Incentivize Forwarded Content

Do you remember chain mail? Basically, it told the recipients of the email that if they wanted to live a life of happiness, they would forward the email to all of the their contacts. For some reason, it worked, and these emails were all over the Internet for a period of time not too long ago.

The same concept can be used today, but in a slightly more sophisticated manner. If you give readers a great reason to forward your email to their friends, they'll do it. For example, offer a 10 percent off coupon for those who forward the email to their friends. People are often willing to go out on a limb for deals like this.

3. Offer Freebies

In order to fight the growing number of people who mark promotional emails as spam, let your customers know that your email is worth keeping in the inbox by including frequent discounts and occasional freebies. Everyone loves a free download for an eBook, and product samples are an instant hit every time.

4. Send Email from Real People

Vary up the "from" box by using real names instead of just your company's email. This doesn't mean you should never send email from your company's inbox. That's an important part of brand building. However, consumers crave human-like interaction from the Internet, and you can gain a lot of leverage by sending email from a real human.

Sending email from a real person offers the priceless ability to reply to emails. When consumers get a message from Jane Doe, Head of Marketing for Your Company, they'll not only see it as a great user experience, but also a valuable opportunity to offer feedback in a reply email.

5. Make Your Signature a Standing Call to Action

Your signature should be a consistent design as a part of your brand building strategy, and it should appear at the end of every email. Why not turn that signature into a call to action?

For example, after you sign your company's name at the end of an email, include a "click here to learn more" phrase with a link to your homepage. Now, you have an email signature that works as a constant call to action.

6. Add Some Dimension to Email Content

Make your content dynamic with some extra dimension. The main trap to avoid with online content is falling into flatland, or using content that's too one-dimensional to really grab a viewer's attention.

Besides including more visually-appealing content, make it more personalized to the viewer. You could split your emails into two categories, for example. One could be for those who've purchased something in the past and could include a link to a sneak peak of upcoming specials. Another could be directed toward those who've never purchased before and could include a great discount for first-time buyers. This kind of dynamic dimension gives your email the personalized feel that customers love.

7. Cross-Promote Emails and Social Media

Cross-promotion of email marketing with social media is one of the best ways to collect emails and to extend email reach. It also enhances user engagement, allowing you to connect with your email audience with a more personal message, and encouraging users to share the email message with others.

The easiest way to pair the two is to include social icons in your emails, then follow up by asking subscribers to connect and share your content. Show them the benefits of connecting with social media as well, such as increased coupons and deals. Email and social media are two of the most powerful forms of communication on the planet today, and marrying them into a cross-promotional marketing scheme is just the recipe you need for growing your email marketing results.