Problem DNS Resolve

[jlucho]

hi guy

I have 2 servers

Server-1 use your own IPs in /etc/resolv.conf
nameserver 1.2.3.4
nameserver 1.2.3.5

Server-2 use your own IPs in /etc/resolv.conf
nameserver 1.2.3.8
nameserver 1.2.3.9


when a mail user on server1 (ie [email protected] ) sends a mail message to a user on server2 (ie [email protected] )
gets stuck in the server queue, with the following error message

[email protected] <[email protected]> R=lookuphost T=remote_smtp defer (-44) H=client2.com [1.2.3.8]: SMTP error from remote mail server after RCPT TO:<[email protected]>: 451 Temporary local problem - please try later


what will be the problem? how can it be solved?

 

[cPRex]

Hey there! Are you able to send a message to the user on server2 from another email account that isn't on server1, such as a Gmail address?

 

[jlucho]

sending emails to external users, work correctly. I can send emails to gmail, hotmail, yahoo, and any other email, except server2 users

 

[cPRex]

Can the other external emails also message server2, though?

 

[jlucho]

hi Guys

external emails such as gmail, hotmail, etc. Yes, they can send messages to users of server1 and server2
works correctly

The only problem is communication between mail users, server1 and server2

Likewise, sending emails from server2 to server1 have the same problem

 

[cPRex]

I would ensure that both machines have the correct option selected in cPanel >> Email Routing, as you can run into this problem if that isn't properly configured.