SPAM buttons are placed in email clients (the tool used to read email) to file a complaint with your service provided about specific email you have received. This button is not the same as your delete button. If you do not want an email but it has not been sent without your permission (from either a form or a prior relationship) please delete it or use the messages unsubscribe functionality to remove yourself from a list. Using the SPAM button makes it more difficult for senders to send their legitimate email. Please use your SPAM button when you get real SPAM and help your service provider fight against SPAM

CiviCRM is a Customer Relationship Management system designed by the open source community. Denver DataMan helps clients leverage CiviCRM to keep track of clients and prospects, interactions with their clients and prospects, track events and many other things. Nonprofits can use it to effectively manage their organization records.

Denver DataMan uses CiviCRM for many client sites.

RSS stands for Really Simple
Syndication. Web developers use RSS to share their updated content without
requiring users to return to their site. RSS creates a concise summary for
readers to quickly decide whether to keep reading or not. This works much like
standard news sites, but now you have more control over the content you receive
and the ability to get many sources of content on the same screen.

See my article on the basics of RSS and Podcasting at the Teaming 4 Technology page or my article on creating RSS and Podcasting Content. Both of these articles are geared towards nonprofits but applicable to anyone