Does the difference in these terms and their definitions matter? No, of course not, it's semantics! But it is interesting to see how the scope of Internet marketing vs Digital marketing has changed over time. In my books, when discussing alternative definitions, I explain that, no it doesn't really matter, but the scope and responsibility is important to make the most of managing the opportunities. So the scope of digital marketing activities should be agreed within a business and/or between a company and its agencies. The biggest difference is whether digital marketing is simply seen as about communications (online marketing) or whether it is broader, looking at underpinning marketing technology and options for new online business and revenue models.
Electronic mailing lists usually are fully or partially automated through the use of special mailing list software and a reflector address set up on a server capable of receiving email. Incoming messages sent to the reflector address are processed by the software, and, depending on their content, are acted upon internally (in the case of messages containing commands directed at the software itself) or are distributed to all email addresses subscribed to the mailing list.
“People often only think of promotional products as items to give away during a tradeshow or to clients. But what about using them in direct mail campaigns? Along with your sales/marketing message, include something like a pen. Those who are on the receiving end are at least 50% more likely to keep the pen, and in doing so, you’ll remain in their house in the future, used or not. ” ~ Logan Lenz, Endagon

How do you find the sweet spot? The best way is to monitor statistics from your email blast software. See how many recipients open your emails, how many click a link, and how many unsubscribe. (Pay attention to the type of recipient, too, as your open rates for loyal customers will be different from new prospects.) Learn what works, make changes, and test again.
I typically create my email artwork in photoshop and then just drop in the jpeg using html and image mapping. Is there a “best practices” when it comes to actually putting the email together? Perhaps speaking from an editing perspective? Basically I make one big image and then use coding: img name, src, alt, a href and so forth. And for every different block, I simply create a new jpg image to use. Is there a better way I should be doing this?
Note: If you want to attach additional files, such as a .pdf, we recommend that you store these files on a cloud storage service, such as Dropbox or Google Drive, and linking to these files within your blast. We do not support file attachments to an email blast as these file types tend to be larger, increasing your chances of triggering spam filters and preventing your blast from reaching your recipients.