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Option to add "X-Mailer" header when sending emails #13182
Labels
A-Email-Push
Email notifications
A-Push
Issues related to push/notifications
P4
(OBSOLETE: use S- labels.) Okay backlog: will not schedule, will accept patches
T-Enhancement
New features, changes in functionality, improvements in performance, or user-facing enhancements.
The X-Mailer header is commonly used to identify the software/SMTP-client used to initiate and send an email.
For example, all emails sent from Facebooks servers (Instagram, Facebook, Whatsapp) have the following X-Mailer header:
X-Mailer: ZuckMail [version 1.00]
Example of different X-Mailer headers in my SMTP-relay
Why?
To make it easier for recievers to build filters depending on the X-Mailer header, and to just keep track on what kind of server the emails originate from.
Example header:
X-Mailer: Matrix-Synapse ${CURRENT_VERSION}
Or, the option to specify in the settings.
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