Setup toSend with FluentSMTP

toSend is a transactional provider. If you do not have an account yet, you can create one. Their WordPress notes also live at tosend.com/docs/guide/wordpress.

In toSend

1. Sign in at dash.tosend.com.
2. Add the sending domain and publish the SPF, DKIM, and DMARC records they show. Wait until the domain is verified.
3. Open API Keys and create a key. Copy it. Keys look like tosend_… (or tsend_…). You only see the full key once.

In FluentSMTP

Settings → FluentSMTP, pick toSend (first-run wizard or Add Connection).

• From Email must be on a domain you verified in toSend. Unverified domains are rejected.
• From Name, force flags, as usual.
• Paste the API Key.
• Additional Sender Emails: extra From addresses on verified domains. FluentSMTP checks them when you save.

Leave Store in Database selected. You can tick Disable Encryption, or switch to Store in wp-config.php. Both are optional. See Where secrets are stored.

Save Connection Settings, then send a test.

You can also add senders later from the connection row (+N senders) on Settings. Same rule: domain must already be verified in toSend.