Auto-reminder for Labeled Emails
You can simply label emails based on filter rules you have already set in Gmail. Use this IFTTT Applet to then automatically add reminders to your phone. Instructions: 1. You should have a label "Urgent Replies" up and running in Gmail to use this Applet. Feel free to change it to whatever you please if the gmail label is different. 2. Create a reminder list on your phone with the name "Urgent Replies". Feel free to change it to whatever you please if your phone's reminder list has a different name. Feel free to modify the priority or "Reminder" field values as well.