Ok! now sending mails works perfectly and I can use the tab mail queues of Zimbra Admin (Before this new installation I couldn't).
Now "only" fails receiving mails, the error is: connect to mail.domain.com[64.000.000.111]: connection refused
My DNS zone is this:
domain.com. 14400 IN A 64.000.000.000
mail 14400 IN A 64.000.000.111 (ip of zimbra server "mail.domain.com")
mail 14400 IN MX 10 mail.domain.com
It's wrong? I don't know much things about DNS (MX , A ...)
Ah!emails accounts have this format: user
@mail.domain.com