So, building up lists of emails is a task you must put some effort behind in order to kick your email marketing efforts into gear. The problem is nobody really wants more email, particularly spam from unknown sources. When I talk about buying email lists, I’m am not talking about buying or renting so called opt-in lists from list brokers. I’m talking about offering something of value as a way to motivate someone to willingly exchange their email address with you in order to receive your offers and additional contact.
Furthermore, advertisers may encounter legal problems if legally required information doesn't actually display to users, even if that failure is due to technological heterogeneity.[86]:i In the United States, the FTC has released a set of guidelines indicating that it's the advertisers' responsibility to ensure the ads display any required disclosures or disclaimers, irrespective of the users' technology.[86]:4–8
Have a clear purpose for the blast. Email blasting customers or partners is not an arbitrary task. Each blast should have a concise purpose before you begin to draft it. Determine what you're trying to deliver and how you want the recipients to react to the email. The blast's purpose could be enticing customers to purchase something, updating employees on a new project or initiative, or a newsletter to recap the month's events. Once you determine the purpose of the blast, you can work on making the message more clear to your recipients.[1]
A/B testing is trying two different techniques that communicate the same message on a small percentage of your list, seeing whether A or B performed the best, then using the better performing option when you email the rest of the list. It sounds complicated, but there are plenty of email marketing solutions out there that take all the math and guesswork out of it. (All you have to do is come up with the option A and option B you want to try.) 

Now that you’re all set up to starting collecting emails, the fun part begins (when I say ‘fun’, I actually mean ‘hard’). If your site receives a good amount of traffic and you have a truly compelling offer, this shouldn’t be too difficult. However, if you’re like most business owners, you’ll need to look outside your own audience to start building your list.
Companies considering the use of an email marketing program must make sure that their program does not violate spam laws such as the United States' Controlling the Assault of Non-Solicited Pornography and Marketing Act (CAN-SPAM),[9] the European Privacy and Electronic Communications Regulations 2003, or their Internet service provider's acceptable use policy.
"Why aren't millennials moving?" The subject line of this email campaign reads before citing interesting data about relocation trends in the U.S. Trulia doesn't benefit from people who choose not to move, but the company does benefit from having its fingers on the pulse of the industry -- and showing it cares which way the real estate winds are blowing.

The best email copywriting starts with the subject line, which has to make recipients want to open your email. Follow that with an appealing headline so they’ll keep reading. Constant Contact’s research suggests that email copy should be short, around 200 words. It’s also wise to avoid being promotional in all your emails. Instead, offer value to your subscribers. The most important part is the call to action which leads recipients from the email to your site or resource.
The purposes of blast emails are often to generate more sales, gain new customers, and increase traffic to the company’s website. To successfully do this, the email must capture recipients' attention, and motivate them to perform an action, such as purchasing an item online. These results can then be easily tracked through the links provided in the email, and the company can use these statistics to determine a conversion rate, or the percentage of customers who take the desired action. For testing purposes, companies often send out several different blast emails to determine which format is most effective, and may even customize email for a particular target audience.
It is important for a firm to reach out to consumers and create a two-way communication model, as digital marketing allows consumers to give back feed back to the firm on a community based site or straight directly to the firm via email.[24] Firms should seek this long term communication relationship by using multiple forms of channels and using promotional strategies related to their target consumer as well as word-of mouth marketing.[24]
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