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Unix has included a mail command] since version 1, when mails were only delivered to other users of the same machine. Today, all unix variants include a command called mail which can send and receive Internet email, but its capabilities vary. Some systems include a Mail or mailx command as well.

Use this tag if you have a question about the mail, Mail or mailx utility. Be sure to mention what operating system and distribution you are using.

If your question is about email in general, use the tag .

The mailx command is standardized in POSIX.

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