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Liam
Asked: 2010-08-20 07:06:34 +0800 CST

Can I set the "In-Reply-To" header when using the Linux mail command?

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I thought I could use:

mail -s "Subject_here" -a "In-Reply-To: Message_ID_here" < body

but unfortunately the -a is unrecognised.

email command-line-interface

2 Answers

  1. Best Answer

    I found this way of using sendmail instead:

    /usr/lib/sendmail -t < body

    The file body should have each header on a separate line, then a blank line, then your message body text:

    To: [email protected]
From: [email protected]
Subject: Example of conversation threading
In-reply-to: <put Message-ID of previous mail here>

Body text here
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  2. I think -a for additional header does not work in case you mail command is Heirloom mailx. In Heirloom mailx -a flag is for file attachment. As you answered to yourself, you can use sendmail, but you can also use -t flag to Heirloom mailx, too.

    mail -t < body

    The body text is same as that of your own answer.

    To: [email protected]
From: [email protected]
Subject: Example of conversation threading
In-Reply-To: <put Message-ID of previous mail here>

Body text here

    This worked for me.

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