To avoid spam, remote mail ports (25, 465, 587) cannot be reached from our infrastructure. If you need to open the mail ports to send e-mail, you can go to the advanced options section of your server and change the security group configuration:
On the left panel of the Control Panel, click on “Security”
Select the Security group you want to unblock remote mail port.
Set “Block SMTP” to No.
The Security group settings will be updated immediately on all our Virtual Cloud Servers. BareMetal Cloud Servers require a hard reboot to apply the new configuration.
Important: Your account needs to be validated to perform this operation. To get your account reviewed, please contact our assistance.