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I need to white-list your mail servers. Which IP addresses does Doodle use to send mail?

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The recommended way of doing this is to white-list the whole domain, and configure your mail solution such that it checks the SPF records to determine if a host is a valid sender. This way you don't have to modify your configuration whenever we change our mail delivery setup.

If your mail solution does not allow this, you can still white-list our IP address ranges:

  • IPv4:, e.g. 94.230.220 and 94.230.221
  • IPv6: 2a02:418:6057::/48

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