Click 'Settings' on the Redmine tab to open the Settings dialog box.
Option 'Convert' allows to configure settings of the converting emails into issues.
Include attachments
Add to creating issue attachments from the email.
The settings below will become editable after enabling this option.
Embedded Images
Add to creating issue embedded images from the converting email.
All other attachments
Add to creating issue documents of other formats from email.
When linking message with an existing tasks
Add to the existing issue attachments from email.
Include email as an attachment
Add an email into the issue as a document in the following format.
Add ID to email subject
Add into the email subject an issue ID which was created by converting this email or ID an issue with which the email was linked.
Include email recipients in the converted task
Automatically adds to the converting issue of the Redmine users who are in the recipients of the email.