Add-on Templated PM based on forum visit

[valdet]

I am looking for Xenforo functionality that would do the following:

Take an existing forum member (admin or a specific one), and have that member automatically send a templated PM to the following:

1. To any forum member that visits the Forum A for the first time
2. To any forum member that has visited the Forum A in the past XX days

Is this something that can be done or if there's something similar already out there ?
We are in XF 1.5.21. Thanks