---
title: "What are SPF, DKIM and DMARC? – Invenitor"
description: "SPF, DKIM and DMARC are settings on your domain that prove your mail is really from you. Here is what Gmail requires and when."
url: https://invenitor.com/glossary/spf-dkim-dmarc
agents: https://invenitor.com/llms.txt
mcp: https://api.invenitor.com/mcp
---

[Home](https://invenitor.com/)/[Glossary](https://invenitor.com/glossary)/SPF, DKIM and DMARC

Glossary

# What are SPF, DKIM and DMARC?

SPF, DKIM and DMARC are settings on your domain that help mailbox providers confirm a message really came from you.

By Invenitor team. Updated 2026-11-01.

## Which of them do you need?

Google says all senders to Gmail must set up SPF or DKIM. Senders of more than 5,000 messages a day to Gmail must also set up DMARC and align their domain ([Google sender guidelines](https://support.google.com/a/answer/81126)). Setting up all three is sensible even at low volume.

## Where do you set them?

In your domain's DNS settings. Your email provider gives you the exact records to add. Most business mail providers have a step-by-step page for this.

## Guides on this

- [How to lower your cold email bounce rate](https://invenitor.com/guides/lower-your-email-bounce-rate)
- [How to write a first email to someone you have never met](https://invenitor.com/guides/write-a-first-email-to-a-stranger)

## Related terms

- [Cold email bounce rate](https://invenitor.com/glossary/cold-email-bounce-rate)
- [Spam rate](https://invenitor.com/glossary/spam-rate)

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