Port 25 restrictions in xneelo Cloud
Outbound traffic on SMTP Port 25 is blocked by default on all xneelo Cloud instances. This means that any application attempting to send email over Port 25 will fail to connect.
If you need to send email from your instance, we recommend using alternative, secure methods. You can also request access to port 25 (see below).
Why port 25 is blocked
Blocking Port 25 is an industry standard to prevent spam and abuse. This also protects our xneelo Cloud IP addresses from being blacklisted, which would affect all customers.
For this reason, Port 25 remains blocked by default. Customers with a legitimate use case can request access (see below).
Secure email delivery methods
You can still send email from your instance using secure, authenticated SMTP services. For example:
Port 587:
Port 587 is the most widely supported option for sending email securely. It uses authenticated SMTP and encryption.
Port 465:
Port 465 supports authenticated SMTP over SSL/TLS.
You can also use:
- xneelo’s hosting mail servers, if you have hosting or email services with us.
- A trusted third-party email provider.
Request access to Port 25
If you have a legitimate use case for sending email directly from your Cloud instance, you can request access to Port 25.
If approved, we’ll enable the Public SMTP network in your xneelo Cloud project. IP addresses on this network permit outbound Port 25 traffic.
Follow the steps to enable Port 25 access in xneelo Cloud.
