The first autoresponders were created within mail transfer agents that found they could not deliver an e-mail to a given address. These create bounce messages such as "your e-mail could not be delivered because..." type responses. Today's autoresponders need to be careful to not generate e-mail backscatter, which can result in the autoresponses being considered E-mail spam.
Ultimately, it boils down to a balance between cost, features, and risk. It's always tempting to simply jump on the lowest-cost solution, but the fact that email is ubiquitous keeps this from being the smart play. It's nearly impossible to escape using it, which means your users, your customers, and the guts of your business have all come to depend on it in different ways. You need to discover those ways, evaluate them, and then choose a service that either meets or improves on them. This takes time, discussion with your IT staff, and some investigation; these are steps you don't want to skip. Otherwise, you'll pay for it later.
You can attach files up to 25MB and upload more than one at a time. Once they are attached, documents and images are displayed as thumbnails, so it’s easy to verify you’ve attached the correct files. When you receive attachments in an incoming message, these, too, are displayed as thumbnails so you can preview and sure they are safe to download to your computer.
Obviously, it takes more work to create and place guest posts, but it’s worth it if the publication is aligned and authoritative. We found a way to create additional value with this as well by working with internal HubSpot experts who wanted to get their thoughts out on a given subject. For example, here’s a guest post that Blake Toder wrote for the Usabilla blog:

Next up is building an email newsletter. The best services offer several ways to do this; you can import your own HTML, start from scratch, or use a pre-designed template. Most of these services have drag-and-drop UIs that let you choose exactly the elements you want to include, as well as image libraries in which you can store assets such as your logo or company photos. Tools that let you test your emails for spam are also essential since there are some seemingly innocuous terms that may send up red flags and drop all of your hard work into your subscribers' junk folders or, worse, get your emails banned before they ever reach their recipients.

I would like to read more of what you might have at the ready (all blogged subjects) that you might deem to be useful for me; for I will read all. And if you possibly had any insightful tips on ANYTHING that you might see as helpful, please reach out to me most graciously, or send me to where I should search. (Sorry, sounds like I am “breaking” one of the 11 tips, by “taking more than giving”)

Finding the right online marketing tools can seem like a difficult task. Luckily, the best email platforms offer an unlimited number of messages and progressive pricing packages. This means that your bills depend on the number of subscribers. So, if you are a small business with a few hundred mailing list subscribers, you will only have to pay a small monthly rate. Constant Contact offers great price points for small businesses. You can even find an email platform that offers free plans for those who need only a limited number of features, like Benchmark. If you are unsure what your needs are, you can opt for a pay-as-you-go plan.
Delivra is an email marketing automation platform designed to ensure the right messages get to the right people at the right moment. The service features automation, a drag-and-drop editor, multichannel drip campaigns, custom and responsive email templates, triggered mailings, and analytics. In addition, Delivra integrates with CRM, e-commerce and web analytic programs.
Talk Fusion is an all-in-one video marketing solution that features video email, video newsletters and sign-up forms. Talk Fusion's products run on both PC and Mac operating systems and can be viewed by users on any internet-capable device. In addition, you can create video emails on iPhone, iPad and Android devices using the Fusion on the Go mobile app. For video emails, you just choose a template, record or upload a video, and send. The service provides comprehensive, real-time reports that tell you who opens and reads your emails, what links they clicked, and if they forwarded the email.
Pay attention to the amount of inbox storage available, because once you reach the cap, you’ll have to  start deleting messages in order to receive more. Many free email services offer a terabyte or even unlimited storage, which is helpful if you tend to receive messages with large attachments, like image and video files. However, even a few gigabytes of storage gives you enough space to hold between 100,000 and 300,000 messages.
The most advanced email marketing services offer custom workflows where you can specify triggers based on actions (such as opening an email or making a purchase) or on inaction (such as ignoring emails). With these services, you can also set up a series of emails (such as tutorials) to be sent to segments of users, and you can pause or stop a campaign at any time. You can also move contacts into new segments once they have completed tutorials.
MessageGears is a hybrid email marketing system that combines the security of an on-premises system with the scalability of the cloud. The service connects directly to any local or remote database, data warehouse, e-commerce system, or content management system. There is no need to extract, transform, or load customer data into the system or to move or replicate data. Features include subject line previews and testing, spam testing, and automation, drip and trigger campaigns.
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