I learned it now 
anyway, I tried to send it again and again it doesn’t send it.
It was sent only to one. this is the message I get:
14 Emails to Send in Total – Step 1 of 1 – Estimated Time Until Completion: 0 Seconds. Please wait…
Email Sent Successfully to USER1
Completed.
and only this user get the email.
This entry passed through the Full-Text RSS service — if this is your content and you’re reading it on someone else’s site, please read the FAQ at fivefilters.org/content-only/faq.php#publishers.