Hi Marlon,
sorry, but you should CHECK and CORRECT your settings
( and pls. keep in mind, that DNS - changes CAN take up to 48 hours, untill all worldwide nameservers are synced! ).
Some additional investigations:
You setup the "myhostname" to "vps.nodos.net" in your postfix - configuration ( /etc/postfix/main.cf ), but
The reverse entry for "85.214.143.130" is "nodos.net"
Your mail - server answers with "srv-nodos.com.es" ( which is now matching the entry at "/etc/hostname" ), but this doesn't change the rDNS - setup for your IP "85.214.143.130".
You now changed the SPF - entry to "v=spf1 +mx +a +a:srv-nodos.com.es ip4:85.214.143.130 ?all" , but again, this doesn't match your rDNS - entry for your IP.
Pls. check as well your file "
/etc/hosts" and make sure, that your settings are correct.