Yes, via port forwarding. I am using IFTTT plus apilio.io to do things like close my garage when my garage has been open for 20 and it’s after 10pm. If it’s before 10, send me an SMS if it’s open for more than 20 min. I can also use IFTTT with my Amazon Echo to “trigger close garage door” or “trigger open garage door” and it will close/open it checking the current state as opposed to just a reversal of the last state.
I’m not sure if Blynk can work with IFTTT. I was not only trying to avoid depending on another app and another service, but also it looked like IFTTT was to some degree integrated. It looks like only to send. To receive, the device had to be exposed publicly (hence the port forwarding).