An autoresponder is a computer program that automatically answers e-mail sent to it. They can be very simple or quite complex.
The first autoresponders were created within mail transfer agents that found they could not deliver an e-mail to a given address. These create bounce messages such as "your e-mail could not be delivered because..." type responses. Today's autoresponders need to be careful to not generate e-mail backscatter, which can result in the autoresponses being considered e-mail spam.
An autoresponder allows you to send email messages automatically to people who have elected to receive them (your subscribers).[1] For example, if you've created a free report, a template, a guide, or other helpful piece of content, you can let your website visitors access it in exchange for their email address.[2]
Such follow-up autoresponders can be divided into two categories:
Autoresponders are also incorporated into electronic mailing list software, to confirm subscriptions, unsubscriptions, posts, and other list activities. Popular email clients such as Microsoft Outlook and Gmail contain features to allow users to create autoresponses.[3] [4] [5]
They are used with autoresponders being used as part of a mailing list manager. These are used by marketers to deliver a queued sequence of messages to mailing list subscribers.[6] [7] Messages are sent relative to the date of subscription to the list or within single list systems, opt-ins that result in the addition of new mailing list tags. However, the length of the sequence for a user should be chosen such that it could be sufficient to accomplish one's goal.[8]