Spamming is mass-sending or forwarding jokes, virus warnings, chain letters, and unsolicited ads. At some point you will probably receive a message that angers you. Consider your tone. Words on a screen don't always capture the tone that you intend and can be easily misinterpreted. Send attachments only when necessary.
Some people have e-mail size limitations or slow connections.
Know how to unsubscribe from mailing lists. If you are subscribed to a mailing list and you want to be removed, either follow the list unsubscribe instructions or contact the list administrator. Respond privately to newsgroup postings .