I'm sorry to be the one to point this out (along with hamarkus), but there is absolutely NO security in this hint. Your connection from your iPhone to gmail's server is secure via https. That's it. Once it is on Google's mail server, though you still own the intellectual property within your email, Google do have access to it.

Plus, according to Google's terms of service, gmail is for personal use only.

This is a non-hint, and does not provide secure communications, as advertised.

If security is important it must be at a cost. If security is important to you, setup your own server and use secure IMAP and SMTP.

*NO* security???

Is that really your opinion??

This is the same as sending a plain text file over the internet?

The same as printing it on a flyer and posting it to a bus stop?

C'mon, it is not *PERFECT* NSA proof security but it is a hell of a lot better than plain text email or plain text chat from a insecure open wifi hot spot.