MailChannels sends messages from a large number of IP addresses. This list of addresses can and does occasionally change. Fortunately, the list is always available in our SPF records. You can look up the list easily using various online tools. We recommend using the SPF record lookup available at MXToolbox & Dmarcian.
- MXToolbox MailChannels SPF
- Dmarcian MailChannels SPF
For instructions on including our SPF records, see our Set up SPF Records guide.
For quick reference, our SPF record include for example.com:
|example.com||TXT||v=spf1 a mx include:relay.mailchannels.net ?all|
As of December 9, 2020, the following is the complete list of netblocks from which we send email: