This is my first post so thank you for your help in advance. For the problem stated below I am seeking your advice here, or a referral to resources that I can read.
Over many years we have built a list of several million email addresses ("EA"). All EAs are double opt-in to our website. Due to the nature of my organization, we haven't needed to email to the full list, and now plan to send a newsletter. Therefore, I assume a significant percentage of the EAs are bad.
I am a newbie to this process. The obvious question is how do other businesses with email lists in the millions properly send their newsletters? Personal contacts with ISPs, Yahoo!, Gmail and Hotmail? What software do they use? From my limited research thus far, is this two step process close? 1. Finding and removing the bad EAs. How? 2. From then on, use a dedicated mail server that we would control to email the list?
Lots of questions. Answer one or all, please!