E-mail promotion is widely used by e-marketers to send new product/service information to their registered customers. For example, airline companies periodically e-mail their registered customers about their e-fares and promotional vacation packages. Spamming refers to sending millions of e-mail promotions to recipients who have never asked for the information. These recipients' e-mail addresses are often purchased or swapped with other businesses. Spamming is at best unethical and at worst illegal.
Someone voluntarily gives you their email address either online or in person so you can send them emails. They may pick certain types of email content they wish to receive, like specifically requesting email alerts when new blog posts are published. Opt-in email addresses are the result of earning the interest and trust of your contacts because they think you have something valuable to say.
Project conversion metrics. The general rule of thumb is that the smaller and more targeted your list, the more you can spend per piece. It’s better to make a strong impression to a few than to make a weak impression to many. Know your cost per unit, and project a conversion rate, so you can estimate whether your campaign will have a positive ROI before running it.
An email blast is a single email message that is sent to a large group of recipients. Email blasts are no longer an email marketing best practice. Email marketers should segment their lists and send targeted messages to their subscribers.  All email blasts need to follow the CAN-SPAM Act, include an unsubscribe link, and accurately identify the person or business that is deploying the email.
A blast furnace is used to create pig iron from iron ore. It is a large vertical chamber lined with refactory (heat resistant) material into which iron ore, lime and charcoal is dropped. The charcoal is burned, with the help of compressed air blowin into the bottom of the chamber via ducts called tuyere's. This generates enough heat for the charcoal to react with the iron ore, effectively stripping out the excess oxygen and leaving the iron behind. After the process has run for some time, the impure pig iron is drained from the bottom of the chamber. The pig iron gets its name from the grid of ducts the iron was drained into, because it resembed piglets suckling alongside the mother.
I think what Brian and the testers are missing is that 15k is neither big enough to be impressive nor small enough to be inviting. It’s not a number that works effectively as social proof, and while I can’t test it out myself, I believe, based on evidence for social proof around the web, that DIYthemes would have had much better success with a combined number in the 50k+ range as mentioned above.
Digital strategist Dr Dave Chaffey is co-founder and Content Director of Smart Insights. Dave is editor of the 100+ templates, ebooks and courses in the digital marketing resource library created by our team of 25+ Digital Marketing experts. Our resources are used by our Premium members in more than 100 countries to Plan, Manage and Optimize their digital marketing. Free members can access our sample templates here. Please connect on LinkedIn to receive updates or ask me a question. For my full profile and other social networks, see the Dave Chaffey profile page on Smart Insights. Dave is a keynote speaker, trainer and consultant who is author of 5 bestselling books on digital marketing including Digital Marketing Excellence and Digital Marketing: Strategy, Implementation and Practice. In 2004 he was recognised by the Chartered Institute of Marketing as one of 50 marketing ‘gurus’ worldwide who have helped shape the future of marketing.
Not really. Email addresses that belong to an "opt in" list have opted to receive emails from, say, the list-purchasing company -- not your company. Even if the opt-in process includes language like, "Opt in to receive information from us, or offers from other companies we think you might enjoy," the fact is the recipient doesn't recall having a prior relationship with you, specifically. This makes it highly likely for the recipients to mark you as "spam" when you arrive in their inboxes. Hey, if they don't recognize you or remember opting in to communications from you ... can you blame them?

Click through rates. Once your subscribers have opened your email, are they actually taking the action you need them to take? If you think that you have a low click through rate, perhaps your body copy is not as effective as it needs to be. Consider the following: Is the copy of your email relevant to the subject line? Did you offer real value to your subscribers in the email? Is your call-to-action clear enough? Is the link easy to find?
It's practically impossible to overstate the importance of direct mailing lists to the success of your direct mail program. The correct mailing list will contain your most valuable prospects. The more careful you are in analyzing and selecting direct mailing lists, the better your chances for success. There are several different categories of mailing lists available on the market today ranging in cost and appropriateness for your market. When you are considering what type of mailing list to buy consider the following three types:
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