SendGrail

SendGrail

SendGrail's own delivery service, available through the SendGrail Provider add-on.

Easy~5 minAPIAdd-on required

Requires the SendGrail Provider add-on

This provider is not part of the SendGrail plugin itself. Install the SendGrail Provider add-on alongside it, then SendGrail appears at the top of the connection picker. With the add-on inactive the provider is simply absent — nothing else changes.

Step-by-step

Install the add-on

Upload the SendGrail Provider plugin to /wp-content/plugins/ and activate it. It needs the SendGrail plugin active first; if SendGrail is missing or too old the add-on stays inert and shows a notice instead of half-working.

Verify your sending domain

In your SendGrail dashboard, add your domain and publish the DKIM and SPF records it gives you at your DNS provider. SendGrail only delivers from a verified domain.

Create an API key

In the dashboard go to API Keys and create one with sending access. It starts with sg_ and is shown once — copy it then.

Add the connection

SendGrail → Connections → Add Connection → pick SendGrail.

Fill in:

• Connection Name: SendGrail
• From Email: an address on your verified domain
• From Name: display name
• API Key: the sg_... key from step 3

Click Save.

Test

SendGrail → Test Email → pick the connection → send.

Keeping the key out of the database

Set the key store to wp-config.php constants on the connection form and define it instead:

define('SENDGRAIL_PROVIDER_API_KEY', 'sg_your_key_here');

The connection then reads the constant at send time and stores nothing.

Troubleshooting

• SendGrail is missing from the provider list — the add-on is inactive, or the SendGrail plugin predates provider add-on support. Check Plugins for a notice from SendGrail Provider.
• Domain not verified — finish DNS verification in the dashboard; propagation can take up to an hour.
• Existing connections stopped sending after deactivating the add-on — expected. The connections are kept, but with no handler registered those emails fall back to WordPress's own mailer. Reactivate the add-on to resume.

What's next

• Email Routing — route specific emails through SendGrail.
• Failure Alerts — get pinged on rejections.
• Registering a Custom Provider — how the add-on plugs in.