I do not know why I am not able to post it myself.
Ludwik, what makes you think you cannot? I believe PHYS-L by default does not send you postings that you wrote. But that doesn’t mean that everyone else didn’t get it. If you are worried, one easy way to check that your postings are getting through to the list is to go to the PHYS-L archives and see if your postings are there.