IN THIS CHAPTER
Sending and receiving email require three pieces of software. At each end, there is a client, called an MUA (Mail User Agent), which is a bridge between a user and the mail system. Common MUAs are mutt, Kmail, Mozilla Mail, and Outlook. When you send an email, the MUA hands it to an MTA (a Mail Transfer Agent such as sendmail), which transfers it to the destination server. At the destination, an MDA (a Mail Delivery Agent ...