Usage

mail_set_in_reply_to(messageId)

Description

Indicates that the mail is a reply to the message with the given messageId. This function automatically sets the In-Reply-To header of the mail so that the receiving mail client can handle it correctly.

This function is especially interesting in conjunction with the mail_save_outgoing_message() function.

Example

${mail_set_in_reply_to('<1910177794.5.1555059600315.JavaMail.username@machine.local>')}

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Last change 2019-04-12
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