Many AOL subscribers experience this problem because their tiny mailboxes fill quickly, and then email from the list is refused. This is much like the previous problem. If you are in doubt, contact the list owner for assistance. He can check to see what email address you used for subscription and help you get things straightened out. You either forgot how to unsubscribe, or are trying to unsubscribe an address that is not on the list of subscribers.
Images clog up the mailing list like nothing else, since their files are so large.
The best way to let people see pictures of your work is to create a web page, where the images will be stored, and then send the URL for this page to your friends on the mailing list. This allows them to visit your page at their convenience, allowing other subscribers on the list to ignore your message if they wish. It is a very simple matter to email the person whose words you wish to quote or reprint, asking permission to do this. Usually, permission is granted, but sometime it is denied. Please respect the wishes of the original author.