I didn't reseved this mail or anything like this, is it many that i graylist all of my incommimg mail first?
If you are a subscriber to the list, and you send an email to the list from the email account you subscribed with, the email will reach the list. As is the *NIX way, you will not normally be notified in case of success, only in case of failure.
So the fact that you did not receive acknowledgement after posting to the list does not imply that the post was not successful. If it had failed, you should have received a warning.
Sam