SPF include directory: which service is behind each include?

The 47 SPF includes we see most often, who they belong to, how many of your 10 SPF lookups each one costs, and whether you actually need it. Usage counts come from our scan of the world's and India's top websites (23 Oct 2026).

IncludeServiceTop-3,000 global sites Top-3,000 India sites
include:_spf.google.comGoogle Workspace (Gmail)631436
include:spf.protection.outlook.comMicrosoft 365 / Exchange Online329304
include:amazonses.comAmazon SES260124
include:mail.zendesk.comZendesk28918
include:_spf.salesforce.comSalesforce (Sales and Service Cloud email)18133
include:sendgrid.netTwilio SendGrid14837
include:mailgun.orgMailgun8943
include:servers.mcsv.netMailchimp10728
include:spf.mandrillapp.comMailchimp Transactional (Mandrill)10430
include:_spf.mail.hostinger.comHostinger Email0132
include:_spf.mx.cloudflare.netCloudflare Email Routing4063
include:secureserver.netGoDaddy email497
include:mktomail.comAdobe Marketo Engage772
include:zoho.inZoho Mail (India data centre)268
include:stspg-customer.comAtlassian Statuspage531
include:spf.mailjet.comMailjet348
include:zoho.comZoho Mail (US data centre)535
include:aspmx.pardot.comSalesforce Account Engagement (Pardot)336
include:_spf.elasticemail.comElastic Email727
include:zcsend.inZoho Campaigns (India data centre)033
include:spf.efwd.registrar-servers.comNamecheap email forwarding1220
include:spf.sendinblue.comBrevo (formerly Sendinblue)1317
include:transmail.net.inZoho ZeptoMail (India data centre)125
include:helpscoutemail.comHelp Scout232
include:_spf.qualtrics.comQualtrics241
include:mg-spf.greenhouse.ioGreenhouse (recruiting)240
include:spf.mtasv.netPostmark212
include:relay.mailchannels.netMailChannels1011
include:_spf.atlassian.netAtlassian (Jira, Confluence)164
include:aspmx.sailthru.comSailthru200
include:spf_c.oraclecloud.comOracle Cloud Infrastructure Email Delivery155
include:zeptomail.net.inZoho ZeptoMail (India data centre)019
include:zohomail.comZoho Mail711
include:zohomail.inZoho Mail (India data centre)216
include:zcsend.netZoho Campaigns315
include:transmail.netZoho ZeptoMail117
include:cust-spf.exacttarget.comSalesforce Marketing Cloud161
include:_spf.protonmail.chProton Mail151
include:shops.shopify.comShopify610
include:_spf.createsend.comCampaign Monitor113
include:email.freshdesk.comFreshdesk85
include:spf.brevo.comBrevo48
include:_spf.mlsend.comMailerLite65
include:sparkpostmail.comSparkPost83
include:spf.privateemail.comNamecheap Private Email35
include:spf.titan.emailTitan Email24
include:_spf-us.ionos.comIONOS Mail02

Combine the ones you need into a single record with the SPF generator, then send a test email to see SPF pass on a real message.

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