Gmail is quick to admit that they read your email, but that: 

Ad targeting in Gmail is fully automated, and no humans read your email in order to target advertisements or related information.


A quick search for a similar discussion on yahoo, hotmail and aol didn't produce any results.

However, you can be certain that the answer would be very similar to the above from google.
Last modified: Thursday, 2 August 2012, 12:30 PM