Why is SMTP Port 25 blocked on my cloud instance?

Outbound traffic on SMTP Port 25 is blocked by default on all xneelo Cloud instances.

If you need to send email from your instance, you can do so using alternative, secure methods.

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 permanently blocked and cannot be unblocked on request.

Secure email delivery methods

You can still send and receive email in the following ways:

• Using xneelo’s hosting mail servers (if you have hosting/email services with us) 
• Using third-party email providers.

You can still send email from your instance using secure, authenticated SMTP services. For example:

• Port 587 (submission) with authentication encrypted SMTP. This is the most widely supported option for sending email securely.
• Port 465 (smtps) for authenticated SMTP with SSL/TLS.