For example, if a particular subscriber’s message number is 4, that means that that subscriber has already received follow-up emails 1,2 and 3. So if I have a 7 part follow up message sequence and I write a brand new followup email (message 8 in the sequence), there is no real way for me to prevent this subscriber from receiving message 8 unless I make his or her message number higher than 8. But if I do this, then that subscriber will never receive messages 4,5,6 or 7.

I don’t know. I’ve been building it for 5 years and only ever added an address when a reader expressly asked me by email to add him (I kept the proof). Gave aWeber my login details and apparently that wasn’t good enough. They waffled that their spam rate is below 0.1% industry standard and mine is slightly above. All I can think is that a handful of readers have been too dumb, lazy or spiteful to just unsubscribe and instead just report me for spam. 🙁 All I know is that my conscience is clear.

And that was that. I didn’t really get any help afterwards, but I trusted that most of them were getting through because my broadcasts were being replied to, and I just hoped it was just some bug or internal error and not actually brakes being put on my emails. I was again, appreciative of the quick call to attention, but was still left hanging a little.
So you should review the product to see if it provides value for your subscribers. Does it work? Is it helpful? How is the support from the product creator? You are co-signing on all of this when you send that email to your list. As a newbie you still need to nurture and protect your list by emailing them frequently with more informative content. Just make sure this product meets your standards.

The primary thing to keep in mind, the supermagic key, is that HTML is used for meaning and CSS is used for presentation. HTML is nothing more than fancy structured content and the visual formatting of that content will come later when we tackle CSS. You might find different approaches elsewhere on the web but HTML Dog focuses on best practice from the outset and getting into the frame of mind of doing things the right way from the start will lead to much better results in the end.
As a software developer protecting your hard work is an important aspect of selling digital products. You want a licensing system that does what you need, is flexible and not get in your way. ProductDyno does that and more. Other licensing systems make you jump through hoops integrating their services, not so with ProductDyno, it… “Protecting Your Hard Work Is Important”
Think about implementing referral links to incentivize your subscribers to spread awareness about your brand, too. Referral links allow your current customers to promote trackable links for your business. In exchange for sending new paying customers your way, you can give them incentives like discounts, coupons, vouchers, cash, prizes or redeemable points.