Normally when you send an email via Gmail's web interface, your IP address is not revealed in the
Received: headers. However, if you configure a device such as the iPhone to send mail via Gmail's SMTP server, your IP address will be revealed every time you send an email from that device.
Is there any way to configure the SMTP server in such a way that I can send email via Gmail's SMTP server on my device (in this case an iPhone), but still have my IP address concealed?
I'm not looking for an answer such as "use the web interface via the mobile browser". I'm looking for something that can use the native apps on my device (in this case iPhone's Mail app).