What ports are blocked?

Due to restrictions set by our providers the following ports are globally blocked and cannot under any circumstances be opened:

TCP:

  • 17
  • 19
  • 25 (outgoing only)
  • 1900

UDP:

  • 17
  • 19
  • 1900
  • 53413

Outgoing SMTP over port 25 is globally blocked. However, you can still receive emails over port 25. To send emails you need to use a third party email forwarding service over a different port, like 587 or 2525. Due to CAN-SPAM Act and EU regulations in combination with the anonymity of our service, there is currently no realistic way to allow email distribution in any region. 

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