Right-click your bookmarks bar and choose Add Page (Chrome) or New Bookmarklet (Firefox).
In Name, put this:
Pin It
In URL, put this:
| # Set this according to your email accounts names and Reminders list name | |
| set firstMailAccount to "Google" | |
| set secondMailAccount to "Yahoo" | |
| set thirdMailAccount to "iCloud" | |
| set RemindersList to "Need Reply" | |
| # Set Red Flag | |
| set FlagIndex to 0 | |
| tell application "Mail" |