There are many uses for an autoresponder. One such use is the publishing and distribution of an ezine or newsletter. Since autoresponder services usually are set up to send automatic responses to the people on the list at certain intervals after they sign up, setting up an autoresponder to send out an ezine can be a little confusing.
Depending on the service or autoresponder that you are using, you will need a broadcast feature. The broadcast feature works essentially the same as the autoresponse feature, with one big difference. The messages are not sent out at intervals. The messages can, however, be scheduled to go out on a certain day, which has no bearing on when the subscriber was actually added to the mailing list. Broadcast messages are one time messages that are only sent to your current mailing list. People who sign up for your list after the broadcast has been sent do not receive it, unless the specifically request it with an autoresponder address, which you must set up.
Using the broadcast feature of most autoresponder services, you can simply go and either type your newsletter, or copy and paste it into the editor, then choose to send the broadcast to...