These often compact agencies or single experts are specialized in email deliverability. Making sure that the email hits the inbox. They are able to solve deliverability (email goes to spam!) problems. Think about managing on-premise or their own servers, or otherwise once there is some real concern / problems with email deliverability, blacklisting, etc.
First of all, BuzzFeed has awesome subject lines and preview text. They are always short and punchy -- which fits in perfectly with the rest of BuzzFeed's content. I especially love how the preview text will accompany the subject line. For example, if the subject line is a question, the preview text is the answer. Or if the subject line is a command (like the one below), the preview text seems like the next logical thought right after it:
Last but not least, we believe helpful support is extremely important specially when it comes to email marketing software. As we mentioned earlier, MailChimp support is not very helpful. You don’t even get phone support unless you’re paying them minimum of $299 per month whereas our #1 pick, Constant Contact offers helpful live chat, email, and phone support to all customers.
Remember when I said a lot of your email recipients will scan your email without reading all the copy? That's why you want to have a clear call-to-action (CTA) button that's easy to spot for even the quickest of email scanners. Without a CTA button, you won't be calling on your recipients to take any action that actually benefits them -- and the growth of your business.
And that leads us right into understanding service pricing and packaging. The email marketing services we reviewed range from about $5 per month to as much as $20 per month for a range of features. Many email marketing plans include unlimited email sends each month and bill you based on the number of subscribers. If you have a small list, then look for a company that offers a free plan, a low-cost plan for several hundred subscribers, or even a pay-as-you-go plan. On the flip side, many of these services also offer high-volume plans with up to 100,000 or more contacts. Sometimes this requires a custom plan that has to be arranged directly with a sales rep. If you're willing to commit, then look for the companies that offer discounts if you pay yearly rather than monthly. A few offer also money-back guarantees.