Deliverability Que tus emails lleguen a la bandeja

Q: What is email deliverability?

It is the ability of your emails to reach the recipient inbox instead of the spam folder or being rejected. It depends on domain authentication, sender reputation and list quality.

Q: What are SPF, DKIM, and DMARC?

They are email authentication protocols. SPF verifies the server can send on behalf of your domain, DKIM digitally signs your emails, and DMARC defines what to do with emails that fail verification.

Q: How do bounces affect deliverability?

Hard bounces (emails that do not exist) directly damage your reputation. If you exceed 5% bounce rate, providers start sending all your mail to spam. Using verified databases eliminates this problem.

20% of legitimate B2B emails never reach the inbox

B2B Email Marketing · Nov 2025 · 5 min read

Key takeaways

20% of B2B emails end up in spam or get server-rejected
SPF, DKIM, and DMARC are mandatory for authentication
Sending to verified addresses protects your domain reputation

The problem

Your perfect email that nobody sees

Email deliverability is the ability of your emails to effectively reach the recipient's inbox. You can have the best copywriting in the world, the most brilliant subject line and an irresistible offer. If your email ends up in spam, none of that matters.

And it's not a minor problem. 1 in 5 B2B emails never reaches where it should. It doesn't even land in spam: it's simply rejected by the recipient's server.

The good news: deliverability isn't black magic. It's a combination of technical configuration, list hygiene, and best practices. And it all starts with the quality of your data. HubSpot's review of the 9 best cold email software tools compares features and deliverability across platforms, helping you choose the right tool for the job.

20%

of legitimate B2B emails don't reach the inbox

85%

of worldwide email is spam according to providers

bounce rate is the limit before you get blocked

Flow

Your email's journey: from your outbox to their inbox

Every email passes through multiple filters before arriving. If it fails at any point, your message disappears:

Compose

Your server

→

SPF/DKIM

Authentication

→

Server

Recipient

→

Inbox

Delivered

Spam

Rejected

Verified emails = fewer bounces = better deliverability

Access databases with verified email addresses from businesses in any industry and country worldwide.

Generate Database Free

Checklist

5 steps to bulletproof your deliverability

Configure SPF, DKIM, and DMARC

These are the three pillars of authentication. Without them, destination servers don't trust your domain. It's like sending a letter without a return address. Close CRM also shares 15 cold email templates designed for high deliverability that you can adapt for your outreach.

Clean your contact list

Remove hard bounces, spam traps, and inactive addresses. With verified data from MapiLeads, you start clean.

Warm up your new domain

Don't send 1,000 emails on day one with a new domain. Start with 20-30 per day and gradually increase over 2-3 weeks. For a systematic approach to scaling outreach, Entrepreneur outlines 4 steps for scaling your agency with cold email that respect deliverability best practices.

Control your bounce rate

Keep hard bounces below 2%. Above 5%, providers start blocking all your sends.

Monitor your reputation

Check domain reputation tools regularly. A good open rate is a sign of good deliverability.

Deliverability is like health: nobody values it until they lose it. Protecting your domain means protecting your most important sales channel.

Authentication

SPF, DKIM, DMARC: what each one does

Protocol	What it does	Without it...
SPF	Verifies the server can send on behalf of your domain	Emails rejected or in spam
DKIM	Digital signature proving the email wasn't altered	Serveres desconfían del contenido
DMARC	Defines what to do when SPF or DKIM fail	No control over spoofing

The best email in the world is useless if it never arrives

Protect your deliverability from the data up

MapiLeads gives you access to verified business data worldwide. Real emails, no bounces, no spam traps. View plans o contact us.

Generate Database Free

Frequently asked questions

What is email deliverability?

It's the ability of your emails to reach the inbox. It depends on domain authentication, sender reputation, and the quality of your contact list.

What are SPF, DKIM, and DMARC?

Protocols de autenticación. SPF verifica el servidor, DKIM firma digitalmente tus emails, y DMARC define qué hacer con emails que fallan la verificación.

How do bounces affect deliverability?

Hard bounces directly damage your reputation. Exceeding 5% causes providers to send all your mail to spam. Using verified databases eliminates this problem.