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.
For instructions on including our SPF records, see our Set up SPF Records guide.
For quick reference, our SPF record include for example.com:
|
Location |
Type |
Value |
|
example.com |
TXT |
v=spf1 a mx include:relay.mailchannels.net ?all |
As of September 2, 2021, The following SPF record contains the MailChannels Netblocks which you are including:
v=spf1 ip4:23.83.208.0/20 ip4:46.232.183.0/24 ip4:199.10.31.235/32 ip4:199.10.31.236/32 ip4:172.255.62.10/32 ip4:172.255.62.11/32 ip4:54.245.125.39/32 ip4:103.18.109.138/32 ip4:54.214.232.113/32 ~all
23.83.208.1/20 should be 23.83.208.0/20 I believe.