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MailChannels – Which IP Addresses does it send from?

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MailChannels sends from a large number of IP addresses and the list of IP addresses from which we send changes from time to time. Fortunately, the list is always available in our SPF records and you can look up the list easily with online tools. We recommend using the SPF record lookup available at MXToolbox:

Another useful tool for listing SPF records is provided by Dmarcian:

As of October 5, 2018, the following single SPF record can be used instead of including the above domains if you require a “flattened” version to reduce DNS lookups:

v=spf1 a mx ?all

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