Connection refused - connect(2) for "******" port 25

[flavio20122]

Hello, I just bought a cPanel hosting on which I host some websites. Everything is going well until I send emails to the domain I host on cPanel. To be precise I cannot receive emails on the domains that I have configured on cPanel but on the other hand I can send emails trough this. I encounter this error when trying to outbound email via my own Smtp to said domain "No SMTP servers were available for email*******.com, Connection refused - connect(2) for "email.**** **com" port 25. Can someone tell me what is the reason please AND how to resolve it? Thank you

 

[cPRex]

Hey there! That sounds like a common issue where your hosting provider doesn't have port 25 opened for traffic. You can use this guide to confirm the issue:

Why is port 25 blocked?

Symptoms When trying to send mail from your server, the mail is never sent. Connections to other servers on port 25 refuse to connect. Description Many providers block access to send data out on...

support.cpanel.net

but the most likely option will be adding an additional port if your provider allows that, or having to use a third-party smarthost to send messages as outlined here:

https://support.cpanel.net/hc/en-us/articles/360052412573-How-to-configure-a-third-party-smarthost

 

[flavio20122]

Hello, sorry for the late reply ? So when you talking about providers , you mean my VPS provider or the domain provider who blocked ports 25 ? Because i host email service with Contabo server and i'm able to send email to other providers like outlook/gmail/yahoo and my principal domain except my subdomain WHERE it signed with this error "No SMTP servers were available for email*******.com, Connection refused - connect(2) for "email.**** **com" port 25

 

[cPRex]

This would be the VPS provider, as the host often blocks that port on their network.