I’m building an app and need SPF DKIM DMARC handled, what should I use?

If your app needs to send email reliably and you want SPF, DKIM, and DMARC handled correctly, the usual recommendation is:

Best practical choice

Use a transactional email provider that supports custom domains and gives you the DNS records to set up:

• Postmark
• SendGrid
• Mailgun
• Amazon SES
• Mailchimp Transactional (if you’re already in their ecosystem)

What they handle

These providers typically help you with:

• SPF: you publish the TXT record they give you
• DKIM: they sign outgoing mail and/or give you DKIM DNS records
• DMARC: they don’t usually “host” DMARC, but they make it easy to configure by sending through your domain correctly; you still publish a DMARC record yourself

Easiest option for most apps

If you want the simplest setup with strong deliverability:

• Postmark if you’re mostly sending transactional email
• Amazon SES if you want low cost and don’t mind more setup
• SendGrid if you want a broad feature set and easier dashboard tooling

Important note

No provider can fully “handle” DMARC for you in the sense of owning it. DMARC lives in your DNS, and you decide the policy:

• start with p=none to monitor
• move to p=quarantine
• then p=reject once everything aligns

If you want a no-maintenance answer

Pick:

• Postmark for best simplicity/deliverability
• Amazon SES for cheapest scale
• SendGrid for general-purpose convenience

If you want, I can recommend the best one based on your stack, volume, and whether you’re sending transactional or marketing email.