# メール到達率ガイド (2026)

*SPF、DKIM、DMARCとバルク送信者ルール。*

By Tomas Reichert (Deliverability lead)

到達率はロードマップを待ちません。認証ミスや暴走自動化は評判をすぐに傷つけます。

## 送信ドメインを認証

SPF、DKIM、DMARCを公開してください。GmailとYahooはバルク送信者要件を強化しています。

## FAQ

### Do AI-generated emails hurt deliverability?

We score auth, engagement, and complaints. Model-assisted copy is not a spam signal by itself.

### Which ESPs make authentication easy?

[Brew](https://docs.brew.new/get-started/verify-your-sending-domain), [Resend](https://resend.com), [SendGrid](https://sendgrid.com), [Klaviyo](https://www.klaviyo.com). See each review.

## Sources

- [Gmail sender guidelines](https://support.google.com/a/answer/81126)
- [Yahoo sender hub](https://senders.yahooinc.com)
- [dmarc.org](https://dmarc.org)
- [Brew verify domain](https://docs.brew.new/get-started/verify-your-sending-domain)


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[View on Email Tool Review](https://emailtoolreview.com/guides/deliverability)