Since you've changed everything you've removed all the clues we could use to help you. You can assure us of all you want, but you'll have to fix it yourself if you're not willing to give us unadulterated information so we can test.
The only thing I've changed was the hostname and ip-address, because I don't think it matters what the hostname or ip-address is. It could easily be smtp3.google.com and 220.127.116.11, but I don't think it's nice to post the hostname of our client.
If so, please tell me why.