The command operates on the user's mailbox if no argument is given.
To send an email the message body is built from standard input.
More information.
- Send a typed email message. The command-line below continues after pressing Enter key. Input CC email-id (optional) press Enter key. Input message text (can be multiline). Press Ctrl-D key to complete the message text:
mail --subject="{subject line}" {to_user@example.com}
- Send an email that contains file content:
mail --subject="{$HOSTNAME filename.txt}" {to_user@example.com} < {path/to/filename.txt}
- Send a `tar.gz` file as an attachment:
tar cvzf - {path/to/directory1 path/to/directory2} | uuencode {data.tar.gz} | mail --subject="{subject_line}" {to_user@example.com}
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