Documentation

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Connect an AI assistant

Your AI assistant can read this documentation directly, so it answers from the current content instead of guessing. Add one of the servers below to your client — they use the Model Context Protocol (MCP). Each one covers a different body of content, so add the one you need.

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Firewall IPs and Ports

Hornbill will send data from the below IPs\Ports. We recommend that you open all the below IPS to your chosen integration points on the required ports. These IPs are static and we will advise of any change at least 30 days in advance

SMTP Traffic

Hornbill will send SMTP Traffic on Port 25 from

Region IP #1 IP #2
Europe 87.117.243.10 212.71.225.67
North America 69.174.249.200 64.34.188.200

POP3/IMAP

Hornbill will connect via POP3/IMAP On Ports 110, 143, 993, 995

Region IP #1 IP #2
Europe 87.117.243.10 212.71.225.20
North America 207.198.105.122 64.34.188.194

HTTP/HTTPS/WSS

Hornbill will communicate using HTTP/HTTPS/WSS on Port 80 or 443 via

Region IP #1 IP #2
Europe 87.117.243.10 212.71.225.20
North America 207.198.105.122 64.34.188.194

Cloudflare

Hornbill uses Cloudflare as a front end to provide geographical caching of static assets, all static content (NOT customer data) requests go via Cloudflare for load balancing, threat mitigation, and prevention. This front end also provides initial SSL certs (via sni.cloudflaressl.com) again for static (NON customer) assets. The list of Cloudflare resolved domains is below

  • login.hornbill.com
  • live.hornbill.com
  • customer.hornbill.com

All other traffic (Customer data) is via the below endpoints.

Hornbills API Endpoints depend on your geographical location and will be listed in your initial connection response, served over HTTP\S from the IPs mentioned above. These should also be whitelisted for HTTPS\WSS on port 443

  • lon-p01-api.hornbill.com
  • lax-p01-api.hornbill.com
  • wsh-p01-api.hornbill.com
  • mdh-p01-api.hornbill.com
  • hhq-p02-api.hornbill.com

Hornbill also makes use of a number of URLs that should be whitelisted, these are

  • login.hornbill.com
  • live.hornbill.com
  • customer.hornbill.com
  • files.hornbill.com
  • files.hornbill.co
  • cdn.hornbill.com

Hornbill’s Data Import Tools will also need to connect to files.hornbill.com and files.hornbill.co

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