I have mail.example.com, all services running smoothly, I'm trying to send to an email but it return the following error:
Any suggestion about how do I add the reverse DNS?
> This is the mail system at host mail.example.com.
> I'm sorry to have to inform you that your message could not
> be delivered to one or more recipients. It's attached below.
> For further assistance, please send mail to postmaster.
> If you do so, please include this problem report. You can
> delete your own text from the attached returned message.
> The mail system
> <firstname.lastname@example.org >: host imp-2.mail.domain.com [18.104.22.168]
> refused to
> talk to me: 554 imp-2.mail.domain.com ESMTP server not available if
> you do
> not have a reverse dns mappin
Please note that example.com which is my domain is hosted US and from the Cpanel I updated the MX records...