Problems with emails

[nbj000x1]

I've recently created a free x10hosting account. Then i created an email account through my cpanel but i'm having problems to send emails to hotmail and gmail domains. Apparently there is no problem, but the recipients didn't recieve those emails. Is anyone else having this problem?

Regards

 

[nbj000x1]

I've made a dns test, and i've got two fails

FAIL
Acceptance of
postmaster
Mailserver rejected mail to postmaster. Mailservers are required by RFC822 6.3, RFC1123 5.2.7, and RFC2821 4.5.1 to have a valid
postmaster address that is accepting mail. The Mailserver provided is:
198.91.81.2 | unexpected response to [RCPT TO: ] | 550 No Such User Here

FAIL

Mailserver rejected mail to abuse. Mailservers are required by RFC2142 Section 2 to have a valid abuse address that is accepting mail.
Acceptance of abuse
198.91.81.2 | unexpected response to [RCPT TO: ] | 550 No Such User Here