Brevo (formerly Sendinblue)

Brevo

Email + SMS marketing platform with a generous free tier (300 emails/day forever). Formerly known as Sendinblue.

Easy~5 minAPI

Prerequisites

• A Brevo account. Free tier gives 300 emails/day.
• A verified sender email.

Step-by-step

Verify a sender

Brevo → Senders & IP → Senders → Add a sender. Enter the email address you'll send from. Brevo emails it a verification link — click it.

For production, set up Domain Authentication under the same menu — gives proper DKIM signing for your domain.

Get your API key

Brevo → SMTP & API → API Keys → Create a new API key. Name it "SendGrail" and click Generate.

Copy the key. Brevo shows it once.

Add the connection in SendGrail

WordPress admin → SendGrail → Connections → Add Connection → pick Brevo.

Fill in:

• Connection Name: Brevo
• From Email: your verified sender
• From Name: display name
• API Key: paste from step 2

Click Save.

Test

SendGrail → Test Email → pick Brevo → send.

Troubleshooting

Sender not authorized to send

The From Email isn't verified. Verify the address (or domain) in Brevo → Senders & IP.

Invalid API key

Double-check that you generated a v3 API key (not the legacy SMTP key). Paste again from Brevo's dashboard.

Hitting the 300/day free limit

Free plans are capped at 300 emails per 24-hour period. Upgrade or use a different connection for high-volume.

What's next

• Email Routing — route marketing emails through Brevo while transactional goes through a faster provider.
• Test & Simulate — verify connection.