Probably just like everybody involved in email design, I am often looking at what other are doing.

The easiest way for me is looking at the emails I get in my personal gmail email address and selecting "Show Original".

I have a few things I found a bit puzzling:

1) Gmail is supposed to strip out the head section (hence the style section), however in my experience, the whole html is there.
Or is it that Gmail just ignores that section, but doesn't strip out anything?
Is Gmail stripping out anything, as this would make it a bad candidate to get the HTML from other emails.

2) Most emails have the content encoded as "quoted-printable":

Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

From the email header:

MIME-Version: 1.0
Content-Type: multipart/mixed; 

Why is that? I need to use an online decoder to get the clean code.

3) However, point 2 is not always true, I looked at an email coming from Paypal, and it just displayed the clean HTML, making it very easy to copy the code and analyse.

Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 7bit
MIME-Version: 1.0

Why is this approach so rare?

4) What do you use to extract the source code of emails that you like coming from others and that you think might help you improve your templates?

Thank you