Email deliverability service doen´s work
Hi, i have one dedicated server in centos, with mail server solution (mailgrid and postfix), and i have the domain name hosting with 1and1 pointing to the server, and i have two troubles:
1- i can send emails from my server, but it´s arrive to spam folder specially in gmail, hotmail yahoo.
2- i can´t receive email from anyone, when i send email from gmail, i have this error "The recipient server did not accept our requests to connect."

The domain hosting, 1and1, don´t offer PTR records (or i cant find them).
What im doing wrong?
Thanks