A couple of weeks ago, I posted a curious situation where a reverse DNS lookup was performed when closing my web browser. This behavior is stopped by stopping Web Shield.
Now, I find that the same thing happens when closing my email program: a reverse DNS lookup to my ISP's POP server is performed. This can be stopped by stopping Internet Mail.
This may not be a problem from avast!'s point of view, but is it necessary? Does it perform a security function?