When a new contact subscribes to your newsletter you may want them to receive your latest newsletter. To do this you can use an autoresponder. To learn the basics of creating an autoresponder you can check out the autoresponder entry HERE.
To set this scenario up, set the autoresponder trigger to “contact subscribes to a list” and select the newsletter contact list. Then, select the action “send an email to the contact” and select your latest newsletter as the email to be sent. This autoresponder will now send the newsletter to new sign ups.
When you are going to send out your next newsletter, make sure to update this autoresponder so that new signups do not receive an old, out-dated newsletter.