Eliminating Junk Mail
Don’t send announcements to people unlikely to care about your "news." People get so many email messages now that they are annoyed by groups that include them on general lists. If you want to be sure to reach everyone who might be interested in your group, send a general announcement once a year about your organization and ask interested people to send you a reply to be added to your emailing list. Create and update the list as necessary, and use only that list for your announcements unless a particular event is likely to attract other people from the larger community.