Since February 2024, Gmail and Yahoo have implemented requirements for email senders to better protect users' inboxes from spam and ensure legitimate emails are delivered. Microsoft announced similar standards in May 2025. With the rest of the industry expected to follow, it is essential for all email senders to comply with these requirements as soon as possible.
| Requirement | Action to take |
|---|---|
| Send from a custom domain | Use a professional email address ending with your own domain instead of a free address (@gmail.com, @yahoo.com, @outlook.com, etc.). |
| Autenticar el dominio con DKIM y DMARC | Set up and authenticate your domain on the Domains page in Brevo. |
| Mantener una tasa de quejas de spam por debajo del 0,3 % | Follow our best practices for email deliverability and monitor your spam complaint rate using Gmail's Postmaster Tools. |
| 🤝 Align your sending domain with the domain you authenticated (bulk senders with a dedicated IP) | Make sure your sending domain matches or is a subdomain of the domain you authenticated with DKIM or SPF. |
¿Qué deben hacer todos los remitentes?
The following sections provide an overview of the requirements and the actions all senders need to take:
🌐 Send from a custom domain
Sending from a free email address (@gmail.com, @yahoo.com, @outlook.com, etc.) will cause your emails to be rejected or filtered to spam. Use a professional email address ending with your own domain instead. You can set one up through providers like GoDaddy or OVH.
➡️ Para obtener más información, consulta nuestro artículo dedicado Por qué hay que reemplazar una dirección de email gratuita por una profesional.
🔒 Authenticate your domain with DKIM and DMARC
DKIM and DMARC are authentication methods that verify that your emails are genuinely from you, protecting against spam, phishing, and spoofing. They also increase the likelihood of your emails reaching your recipients' inboxes.
➡️ To learn more, check our dedicated article Authenticate your domain with Brevo (Brevo code, DKIM, DMARC).
Expand the following accordions for additional guidance on domain authentication:
- In Brevo, go to the Senders page.
- Next to each sender, make sure the DKIM signature and DMARC policy are marked with a green checkmark ✅.
If either is marked with an orange warning icon ⚠️, your domain has not been authenticated correctly. To learn more, check our dedicated article Troubleshooting issues with domain authentication.
Update your existing DMARC record and add Brevo's rua tag at the end. Your DMARC record should have the following value:
v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com
📉 Stay under a 0.3% spam complaint rate
Gmail, Yahoo, and Microsoft monitor how often recipients mark your emails as spam. Keeping your spam complaint rate below 0.3% is required to maintain inbox placement. If your rate exceeds this threshold, your emails are more likely to be filtered, and recovering your reputation can take significant time and effort.
➡️ To learn more, check our dedicated articles Best practices for email deliverability and FAQs - Why are emails being delivered to the spam folder?
Expand the following accordions for additional guidance on monitoring your reputation with Gmail, Yahoo, and Microsoft:
Postmaster Tools is Gmail's monitoring tool for email senders. It lets you track your spam complaint rate, domain reputation, and delivery errors for Gmail recipients. Setting it up is strongly recommended for any sender who regularly sends to Gmail addresses.
Step 1: Add your domain to Postmaster Tools
- Ve a Postmaster Tools.
- Haz clic en Get Started (Empezar).
- Enter the domain you use to send your emails.
- Copy the TXT record provided by Postmaster Tools.
Step 2: Verify your domain
- Log in to your domain provider account in a new tab. If you are unsure which provider you use, check our dedicated article Identify your domain provider.
- Go to the page where you manage DNS records.
- Create a new TXT record.
- Pega el valor que copiaste de Postmaster Tools.
- Save the DNS record.
- Go back to Postmaster Tools and click Verify.
Once verified, you will be able to view your spam complaint rate from Gmail addresses, along with other email performance data. To learn more about how to use Postmaster Tools, check Google's dedicated help center section.
Yahoo and Microsoft also offer their own monitoring tools. Expand the following accordions to learn more.
Use the Yahoo Postmaster portal to access sender metrics and register for the Yahoo Complaint Feedback Loop, which notifies you when Yahoo users mark your emails as spam.
Use Smart Network Data Services (SNDS) to monitor your IP reputation with Outlook and Hotmail recipients.
What bulk senders (more than 5,000 emails per day) with a dedicated IP should do
🤝 Align your sending domain with the domain you authenticated
For DMARC to pass on your emails, the domain you send from must be consistent with the domain you authenticated. If you send more than 5,000 emails per day on a dedicated IP, make sure the domain part of your sending email address matches or is a subdomain of the domain you authenticated with DKIM or SPF.
The following table shows examples of correct and incorrect alignments:
| Dominio autenticado | Dirección de email del remitente | |
|---|---|---|
| Ejemplo 1 ✅ | noticias.miempresa.com | marketing@news.mycompany.com |
| Ejemplo 2 ✅ | miempresa.com | marketing@mycompany.com |
| Example 3 ❌ | miempresa.com | marketing@news.mycompany.com |
| Ejemplo 4 ❌ | noticias.miempresa.com | marketing@mycompany.com |
What happens if you do not comply
If you are sending from a free email address or have not authenticated your domain, Brevo temporarily replaces your sender address with a compliant one. This is a stopgap measure to maintain basic deliverability, not a permanent solution. Recipients may not recognize the replaced address and mark your emails as spam, further damaging your sender reputation.
We strongly recommend making the required changes as soon as possible to send with your own domain and protect your deliverability long term.
| Email address | |
|---|---|
| Original | mycompany@gmail.com |
| Replaced (marketing emails) | mycompany@5000001.brevosend.com |
| Replaced (transactional emails) | mycompany@5000001.t-sender-sib.com |
FAQ
Expand the following accordions to find answers to common questions about Gmail, Yahoo, and Microsoft's sender requirements.
Gmail and Yahoo have required compliance since February 1, 2024. Microsoft announced similar standards on May 5, 2025. With the rest of the industry expected to follow, we recommend that all senders comply with these requirements regardless of their current recipient base.
Yes. These requirements are set by Gmail, Yahoo, and Microsoft and apply regardless of which email service provider you use.
Yes. Transactional senders should also comply, particularly those sending more than 5,000 emails per day.
Given that major mailbox providers have adopted these requirements, the rest of the industry is expected to follow. We recommend that all senders authenticate their domain and follow these practices regardless of their recipient base.
Yes. Brevo replaces any free email address used for sending, regardless of the recipients.
No action is needed on your side for the following requirements, which Brevo already handles automatically:
- Valid forward and reverse DNS records (PTR records) for sending domains and IPs.
- Email formatting compliant with the Internet Message Format standard (RFC 5322).
- One-click unsubscribe support for the list-unsubscribe header (RFC 8058) and a visible unsubscribe link in the body of marketing and subscribed emails.
- SPF authentication for dedicated IP users, set up during the dedicated IP configuration process.
⏭ ¿Qué es lo siguiente?
- Authenticate your domain with Brevo
- Best practices for email deliverability
- Directrices para remitentes de email de Google
- Prácticas recomendadas de remitente de Yahoo
- Microsoft's sender requirements announcement
🤔 ¿Tiene alguna duda?
Si tiene alguna pregunta, no dude en ponerse en contacto con nuestro equipo de asistencia mediante la creación de un ticket desde su cuenta. Si todavía no tiene una cuenta, puede ponerse en contacto con nosotros aquí.
Si necesitas ayuda con un proyecto usando Brevo, podemos ponerte en contacto con la agencia partner de Brevo adecuada.