To avoid spam, remote mail ports (25, 465, 587) cannot be reached from our infrastructure by default. If you need to open the mail ports to send emails, you can enable them from the security group configuration:
Important: A justification will be required for the use of SMTP ports and to send emails from your instances. Please contact our assistance for more information.
Click on Instances, on the left panel of the Scaleway Console.
Click on the Security Groups tab.
Select the security group for which you want to enable SMTP ports.
Tick the checkbox Enable SMTP in the security group information.
The security group settings will immediately be updated on all yourvirtual instances.