.bp .sh 1 "Glossary" .pp This section contains the definitions of a few phrases peculiar to .i Mail . .ip "\fIalias\fP" An alternative name for a person or list of people. .ip "\fIflag\fP" An option, given on the command line of .i Mail , prefaced with a \-. For example, .b \-f is a flag. .ip "\fIheader field\fP" At the beginning of a message, a line which contains information that is part of the structure of the message. Popular header fields include .i to , .i cc , and .i subject . .ip "\fImail\ \ \fP" A collection of messages. Often used in the phrase, .q "Have you read your mail?" .ip "\fImailbox\fP" The place where your mail is stored, typically in the directory /usr/spool/mail. .ip "\fImessage\fP" A single letter from someone, initially stored in your .i mailbox . .ip "\fImessage list\fP" A string used in .i Mail command mode to describe a sequence of messages. .ip "\fIoption\fP" A piece of special purpose information used to tailor .i Mail to your taste. Options are specified with the .b set command.