If you are advertising your products or services to a specific community, and somehow end up on their e-mail list serve, be careful how you approach getting your email address removed from that group. Below is something that what was recently sent out on a list serve (with name of sender and community replaced with XXXXX) but otherwise the post is exactly as was sent, including all caps.
"PLEASE TAKE ME OFF THIS E MAIL LISTING. I DO NOT LIVE IN XXXXX, JUST ADVERTISE IN NEWS LETTER. PLEASE CONFIRM AND THANK YOU XXXXX XXXXX"
So basically that person wants the money from the community, but not those pesky emails. Interesting indeed, but not very clever. Well, there is a different way of approaching that specific situation versus sending out a blast email to all your potential clients. So listen and learn, be careful what you say to your clients.