Cuando mando un correo a un dominio de mi servidor me responde:
This is the mail system at host xxx.miservidor.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
<corredodestino@dominio.com>: mail for domino.com loops back to myself
Final-Recipient: rfc822; correodestino@dominio.com
Original-Recipient: rfc822rfc822%3Binfo@runtechstaff.comorreodestino@domino.com
Action: failed
Status: 5.4.6
Diagnostic-Code: X-Postfix; mail for dominio.com loops back to myself