Why Can't My Customers Find the Emails I Send?

We spent a full day on exactly this for a client who sends a welcome series to new contacts through Brevo, an email marketing platform. The emails looked fine from the inside. People on the list still said they could not find them.

What we learned is that "my emails are not arriving" is rarely one problem. It is usually one of four separate things, and each one needs a different fix. Checking them in order saves a lot of guessing.

Verified is not the same as authenticated

This was the biggest surprise. A sender can show as "Verified" in the platform and still be, for practical purposes, unauthenticated. Verified only means the platform knows the From address belongs to the account. Authenticated means DKIM and DMARC are set up in the domain's settings, and that is what the big mailbox providers actually check.

When the domain is not authenticated, a test email can vanish completely. Not in the inbox, not even in Spam, and no error shown inside the platform.

The odd sender address while you wait

After the records are added, there is a waiting period. Until DKIM finishes setting up, Brevo quietly sends from its own fallback address, something like info@ followed by an account number at brevosend.com, while still showing your business name. It is a protection measure, not a fault. But it looks alarming if nobody warned you, and your own address is not visible to customers yet.

In our case, DMARC confirmed quickly while the DKIM records still showed a "mismatch" for hours, even though they matched what Brevo displayed character for character. They were not wrong. They were still spreading. Brevo itself says this can take up to 48 hours, so check the waiting time before you rewrite a record that is already correct.

Delivered does not mean seen

Platform reports are easy to misread. "Delivered" means the receiving mail server accepted the message. It does not mean the email reached the main inbox, and it does not mean a person saw it. Estimated opens are an estimate, not proof either.

And even a fully authenticated sender will see marketing style emails, the ones with buttons and an unsubscribe link, sorted into Gmail's Promotions tab. That has nothing to do with whether the domain is set up correctly.

One more thing we now do every time

On the contact list screen in Brevo, the button that blocks contacts sits right next to the menu you use to add contacts to an email series. They are easy to mix up at a glance. Blocking opens a box that asks you to type a number to confirm. We came close to that mistake and caught it in time, so our habit now is to read the title of any confirm box before typing anything into it.

Common Questions

My email platform says the email was delivered. Why can't my customer see it?

Delivered only means the receiving mail server accepted the message. It does not mean the email reached the main inbox or that a person saw it. Ask the customer to check the Promotions tab, the Spam folder and All Mail before assuming it never arrived.

Is my sender address being verified the same as my domain being authenticated?

No. Verified only confirms the From address belongs to your account. Authenticated means two records called DKIM and DMARC are set up in your domain settings, and those are what Gmail, Yahoo and Microsoft look at when deciding whether to deliver your mail. A verified but unauthenticated sender can see test emails vanish with no error shown.

Why are my emails coming from a strange brevosend.com address?

Until your domain's DKIM record finishes setting up, Brevo sends from its own fallback address on brevosend.com while still showing your business name. It is a protection measure, not a fault. Once DKIM is confirmed, your real address shows again.

Why do emails land in the Promotions tab even after the domain is set up?

Gmail sorts marketing style emails, with buttons and unsubscribe links, into Promotions even for fully authenticated senders. That sorting is separate from whether your domain is set up correctly.