BY MAIL

After the second unsuccessful in person attempt, the clerk at the magistrate court must mail a copy of the Rule, the documentation of the service attempts, and a verification by the clerk that envelope is properly addressed. 

If you are served by mail, your ten days starts on the eleventh day after the date of mailing.  In other words, if the Rule is mailed on Day 1, then the ten days to respond start on Day 11.  BUT, if you contact the magistrate court before the eleventh day, then the ten days start to run from the day you contact the court.  For example, if you get served by mail and you call the court on Day 3, then Day 3 becomes the first day of your ten day response period.