Server IP Addresses Depending on various client project requirements you or your I.T. department may require server IP addresses. For example, there may be IP restrictions or traffic routing requirements where an IP address is required. The IPs listed here are egress traffic. Development, Testing and Preview For development and preview sites, traffic will originate from one of these IP addresses. 208.124.170.242 178.128.233.75 134.122.33.16 137.184.172.18 137.184.172.19 Production, Staging and Beta For production and staging sites, traffic will originate from one of these IP addresses. 209.217.117.82 209.217.117.84 209.217.117.88 159.203.14.67 167.99.176.52 167.99.176.218 SPF Records for Email Tomahawk mail servers and Mailgun mail service are used for email delivery. Tomahawk mail services are being phased out and replaced with Mailgun services The following is a sample TXT record from DNS.  "v=spf1 include:spf.tomahawk.ca include:mailgun.org ~all"