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 (outbound)*
  • 1900

UDP:

  • 17
  • 19
  • 1900
  • 53413

* Outbound SMTP over port 25 is blocked, you can still receive emails on port 25 however. To send emails you need to use a third party email delivery service over port 587. See managed email for more details.

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