Prefixing the Email Subject with [projectname trac]
It's useful to prefix the emails sent from trac with the project or company name to distinguish from other trac systems. To do this, edit the trac.ini file and change the following line,
smtp_subject_prefix = [projectname trac]
As with all trac configuration changes, there is no need to restart the server. The next trac email subject will be prefixed by [projectname trac].