Which ports are closed?

Mass SPAM is prohibited, so by default all outgoing connections on port 25 are blocked.

In addition, the following ports are blocked:

Outgoing tcp 3389

Outgoing udp 389

Outgoing tcp 465

Outgoing tcp 587

Outgoing udp 53413

Incoming udp 53

Incoming and outgoing tcp and udp 1900

Incoming and outgoing udp 11211

Incoming and outgoing tcp and udp 137

Incoming and outgoing tcp and udp 138

Incoming and outgoing tcp and udp 139

Incoming and outgoing tcp and udp 445

Incoming and outgoing tcp and udp 4145

If you need to unlock any ports, contact support.