I would like to automatically add a prefix to the subject line everytime I send email to a particular group I have set up in Gmail.
For example, whenever I email a colleague, I want to add "Office:" to the beginning of the subject line. This is to help me and others filter out work email when using personal accounts.
I know there are other options to do the filtering (Gmail labels are great!), but not everyone is on Gmail and don't have the same kind of options. Also, emails tend to come from various different personal accounts, adding to the confusion. So it would make things easier if all emails went out as:
Office: Actual subject line
How can I set this up to happen automatically when emailing a particular group?