The last post is a little confusing (to me). It appears to instruct us to setup filtering on our mail client. While the iPhone presently has no filtering capability (that I am aware of).
Correct. The filter example I gave was for Mail.app (can be adapted for Thunderbird and others) on your desktop system, NOT for the iPhone.
Here's what I don't understand:
If you send from any mail client OTHER THAN the GMail web interface, you should NOT get a copy of your message 'back'. So, sending from the iPhone should NOT cause this problem. I believe that the iPhone may default to having the setting "always cc: myself" set to 'on', which would explain why you're experiencing it with mail you send from the iPhone. If that setting is not 'on' in the iPhone Mail preferences for that account, then I don't know - I'd have to play with it myself to figure out what's going on. There should be no need for any filtering or other work-arounds when sending from Mail on the iPhone.
If you send an email from the GMail web interface, you *will* get the copy back in your POP client, so the filtering example I gave solves it and files the message as 'sent'. This works nicely so that if you do send from the web interface, you have the sent item in Mail.app as well.
What I need to do, to get rid of the sent mail showing up in my inbox, is get rid of it from my google account. I setup a gmail filter to do such a thing. BUT, it filters the entire conversation and not single emails. At least that is the result I see when I use their test button.
Anyone know a way around this? (Yes, I've done a quick search of the google forums).
Setting up a filter in GMail (web) is not going to work right at all. You can't filter on the correct message header, and you'd lose the 'sent item' if you could. Read what I posted above, it's either the 'cc: myself' setting, or something is very weird with the account setup.
When you set up the account on the iPhone, did you pick 'GMail' or 'POP'? If you picked 'GMail', delete the account and set it up as a generic POP account. Incoming mail is pop.gmail.com, SSL, on port 995. Outgoing mail is smtp.gmail.com, SSL, on port 587.