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.