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Default network restrictions

To protect the platform from spam and abuse, we blocks several outbound SMTP source ports on all KVM vServer plans by default.
Attempting to send email through these ports will fail until you request access. If your application depends on email delivery, make sure to request the ports you need before going live.
The following source ports are blocked by default on all KVM vServer instances:
PortProtocolService
25TCPSMTP
465TCPSMTP (SSL)
587TCPSMTP (submission)
2525TCPSMTP (alternate)

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Requesting port access

You can request any of the blocked SMTP ports to be unlocked on your account.
1

Open a support ticket

Log in to the Packets Decreaser client area and open a new support ticket. Specify which port or ports you need unblocked and provide a brief description of your intended use case (for example, sending transactional email through a third-party SMTP relay).
2

Wait for review

The support team will review your request. Port unlock requests are typically processed within one business day.
3

Confirm access

Once approved, test your connection to confirm the port is reachable from your vServer.
Port unlock requests are evaluated on a case-by-case basis. Providing clear context about your use case speeds up the review process.