Open and click tracking
Opt in per message to learn who opened and who clicked. Engagement arrives as webhook events; it never changes delivery status.
Enable per message
Tracking is a per-message toggle, off unless you ask for it. With opens on, we embed an invisible pixel; with clicks on, we rewrite links through a redirect on your authenticated tracking domain, so the wrapped URL still carries your name.
json
{
"from": { "email": "you@yourcompany.com" },
"to": [{ "email": "user@example.com" }],
"subject": "Your weekly summary",
"html": "<h1>Hello</h1>",
"tracking": { "opens": true, "clicks": true }
}How results arrive
Opens and clicks arrive as message.opened and message.clicked webhook events, correlated to the original message by id, tags and metadata. They are engagement signals, not delivery: a message.opened never moves the message out of delivered.
Open tracking is best-effort by nature — a mailbox that blocks remote images, or pre-fetches them, makes the open count an estimate, not a headcount. Click tracking is reliable; treat opens as a trend, not a receipt. Respect privacy and local law when you turn it on.