When I visited a proxy-check site accessing through a proxy server, I found that my true IP didn’t appear.
But in the header of the mail that I sent—using Thunderbird—accessing through the same proxy server, there appeared my true IP. Why does this phenomenon occur?
In both Firefox and Thunderbird, I check the item “Use this proxy server for all protocols” just below “HTTP Proxy: foorbar”
Here is what the headers look like; my IP would be in the area where there is now [---.---.--.---]
:
Received: from [192.168.0.4] (ISP's URL [---.---.--.---])
by mx.google.com with ESMTPSA id ---------------.0.2015.03.29.--.--.--
for <[email protected]>
My SMTP server settings on the Thunderbird are:
Port: 465
(Probably I use SMTPS.) and
Connection Security: SSL/TLS
Also, If the IP of the proxy server is something like 99.99.99.99:8080
,
then in the SMTP server settings on the Thunderbird, should port number be 8080
?