I have a problem with a hosted client and can not find the solution. I have tried everything.
We have a hosted domain, We can send emails, and receive SOME emails. Other emails didn't arrive, and don't bounce.
MX Record Target: 0 mail.arpan.com.ar.
IP address: 220.127.116.11 (united states)
Status: Connect failed : 421 Too many concurrent SMTP connections; please try again later.
Test duration(ms): 2
Please, help me with this.
Thanks in advance.
From the look of things you don't have an MX record setup on the DNS servers the domain is using -
You are currently using the GoDaddy name servers vs the cPanel name server - I suggest keeping it that way so that if there is ever an issue with your server you can still adjust your DNS
Once you adjust that you should be good to go
Once your issue is resolved,
please be sure to come back and click accept for the solution