Platform Guides

Mar 9, 2026

9 min read

How to Set Up SPF, DKIM and DMARC for Brevo (2026)

Brevo (formerly Sendinblue) is a marketing and transactional email platform used by businesses of all sizes to send campaigns, automations, and SMTP relay traffic. Without proper SPF, DKIM, and DMA...

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Mar 3, 2026

10 min read

How to Set Up SPF, DKIM and DMARC for Postmark (2026)

Postmark is a transactional email delivery service used by developers and product teams to send application-triggered email at scale. If your domain sends through Postmark without SPF, DKIM, and DM...

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Feb 24, 2026

9 min read

How to Set Up SPF, DKIM and DMARC for ConvertKit (2026)

ConvertKit (now rebranded as Kit) is an email marketing platform used by creators and small businesses to send newsletters and automated sequences. If your From address uses your own domain, you ne...

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Feb 17, 2026

9 min read

How to Set Up SPF, DKIM and DMARC for HubSpot (2026)

HubSpot sends marketing emails, transactional emails, and CRM-connected messages from your domain, making it a significant source of outbound mail that must be covered by your email authentication ...

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Feb 11, 2026

10 min read

How to Set Up SPF, DKIM and DMARC for SparkPost (2026)

SparkPost (now part of Bird) is a cloud email delivery platform used to send transactional and marketing email at scale. Without SPF, DKIM, and DMARC records in place, mail sent through SparkPost o...

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Feb 4, 2026

9 min read

How to Set Up SPF, DKIM and DMARC for Google Workspace (2026)

Google Workspace sends mail on behalf of your domain using Google's infrastructure, and without SPF, DKIM, and DMARC in place, those messages are vulnerable to spoofing and deliverability problems....

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Jan 29, 2026

10 min read

How to Set Up SPF, DKIM and DMARC for Salesforce (2026)

Salesforce sends transactional, marketing, and CRM-triggered email on behalf of your domain across several products — including Sales Cloud, Marketing Cloud, and Salesforce Pardot — each of whi...

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Jan 23, 2026

9 min read

How to Set Up SPF, DKIM and DMARC for GetResponse (2026)

GetResponse is an email marketing and automation platform used by businesses to send newsletters, campaigns, and transactional messages. If your domain sends through GetResponse without proper SPF,...

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Jan 17, 2026

9 min read

How to Set Up SPF, DKIM and DMARC for SendGrid (2026)

SendGrid is a cloud-based email delivery platform used for transactional and marketing email. Without proper SPF, DKIM, and DMARC configuration, mail sent through SendGrid on your domain is vulnera...

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Jan 9, 2026

10 min read

How to Set Up SPF, DKIM and DMARC for Mailjet (2026)

Mailjet is a cloud email sending and marketing platform used by businesses to send transactional and bulk email. If your domain sends through Mailjet without proper SPF, DKIM, and DMARC records, th...

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