Outgoing SMTP Port 25


As of 2018, DataPacket no longer allows by default outbound email connections through TCP port 25 (SMTP) on VPS or Dedicated servers.

Why is the outgoing email port blocked?

Outgoing SMTP port 25 is blocked due to the large amount of abuse this port is susceptible to. We offer you the option to use our outgoing SMTP servers with advanced spam filtering as a relay (smarthost) or you can use a third party email relay service if you need to be able to send outbound email from the server.

What options do I have if I want to send email from my server or application?

DataPacket clients can configure their email servers to use our smarthost, it provides advanced spam filtering to prevent abuse, or can employ the use of a smarthost outside of the DataPacket network to send email from your server. A smarthost is simply a relay host that relays SMTP traffic from an SMTP server, mail client, or any other service or programming language capable of handling SMTP. Servers typically send this type of traffic via the mail submission TCP ports 465 or 587. DataPacket VPS or Dedicated Server clients can communicate with those or any custom port of their choosing only outgoing TCP port 25 is blocked.

Does DataPacket offer a Smart Host service?

DataPacket does offer you free smarthost service to relay your outbound mail. Our smarthost servers are deployed with advanced filtering to prevent spam from passing through our network.

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