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system/e-mail.md

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+# Terminology
+
+|MTA | Mail transfer agent |
+|POP3| Post Office Protocol 3 |
+|SMTP| Simple Mail Transfer Protocol|
+|IMAP| Internet Message Access Protocol|
+
+There are a number of Linux e-mail agents - postfix, sendmail, exim (insecure) and qmail (dead).  
+
+# Programs
+
+> sudo apt-get install postfix mailutils
+
+This will register your domain in the /etc/postfix/main.cf file.
+
+# Internal Mail
+
+> sendmail -t roach-1
+
+Write a message and stop composition with Ctrl+D.
+
+The mail is kept in /var/mail/ and you can read it with:
+
+> mail
+
+# Aliases
+
+Aliases are groups of mail recipients.  The lists are kept under /etc/aliases.
+
+`crew: matthewlynas@gmail.com,ghost,danial@yahoo.com`
+
+Update the list of aliases from this with:
+
+> sudo newaliases
+
+Then you can:
+
+> sendmail -t crew
+
+... and send to the whole crew.
+
+
+View pending e-mails using:
+
+> mailq
+
+