so, would you use a service or just send out a mass email? About 2 years ago I sent out a mass email to many of my customers to announce a different part of our business and attach a catalog. I had about 2 or 3 people asking to be removed from the mass email. It was weird because I only sent 1. But I guess some people are triggered....
Changing locations, I wouldn't think of qualifying as the same thing as just sending out an email saying that we are offering a new service. However, I never had to do deal with that as even if I were to move, it's all email and drop shipping with me to my customers. Now, I must say, I don't mind a little bit of marketing with a vendor that I have an established relationship with, it's really only those that are out of the blue. I cannot tell you how much I dislike cold calls, even more so compared to unsolicited emails. Although, cold calls, I dislike regardless if I have a previous relationship as well. That's more interfering when I'm trying to get work done, emails I can deal with when I have down time and my workflow is already in a lull.
I have only used a newsletter service that was a plugin with my server, but that was opt in as well, so they were well aware that they would be getting notifications from time to time.