Gabriel - Both of your messages were received here from the list.
You can always check the archives to see if you had success.
Some mailers don't allow echoed messages back to the poster - I don't receive messages I post to greenkeys from my gmail account. It is Gmail's fault - a very stupid policy IMHO
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I set my greenkeys account to acknowledge posts because Gmail will let the acknowledgement (but not the original) come back to me. So I know that something made it.
And you can always check the archives to see if you had success.
Good luck!