Disable Author name in emails
Is it possible to disable the authors name in replies as it's causing a bit of a mess with Outlook.
You can disable the behavior by setting an email address with a display name (e.g. "Redmine <firstname.lastname@example.org>") to "Emission email address" setting (Administration > Settings > Email notifications).
Redmine does use an author's name as a display name if "Emission email address" already has a display name. Please see #5913#note-17 for details.