All of our mail is routed through a premium delivery service called ‘MailChannels’. As such, the SPF records need to indicate this to ensure accurate delivery.
Correct Sender Policy Framework (SPF) records need to be configured in your DNS settings to ensure that Internet receivers will properly identify and receive your email. This article describes the DNS records you must add.
DNS Records
The following records are needed for SPF to work correctly. Replace example.com with your own domain name:
v=spf1 a mx include:relay.mailchannels.net -all