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Choose how port 25 (SMTP) is configured for your IP.

DISABLE - Filtered Port 25 (Default, no extra cost) — Port 25 is filtered for anti-spam protection. Recommended for most use cases that don't require direct outbound SMTP.

ENABEL - Open Port 25 (paid) — Port 25 is fully open for sending email via SMTP. This option requires a refundable security deposit of €380 per IP, added to your account balance before activation. The deposit covers potential delisting costs if the IP ends up on a spam blacklist due to email activity from your server. If the IP is never blacklisted, the deposit stays on your account balance and can be used for future services, or refunded upon request when the service is cancelled.