Whereas Hotmail and Yahoo! are responsible ‘net citizens and include the sender’s “real” IP in the email headers, Gmail does not. In layman’s terms Gmail helps to anonymise your email.
Well this brought up some mixed feelings. On the one hand, the author is right, it is somewhat irresponsible to do what Gmail does. On the other, Gmail that so many times has been criticized for draconian (i.e. thwarting user privacy) use policies, that this somehow seems as a retraction. Oh well, I guess that I’ll continue to follow my own policy regarding Gmail: least possible use (and below that if possible).