What the ✓✓ checkmarks mean.
Grey means sent, green means a real person opened it. Here's exactly how to read them.
- Grey ✓✓ — delivered, not opened yet (or opened without images loading; see below).
- Green ✓✓ — opened by a real human. Bots and scanners never turn ticks green.
You'll see checkmarks in your Sent list and next to each of your own messages inside a conversation. Hovering a green tick shows who opened and when — names and times are a Pro feature; free shows the open itself.
Why a tick can stay grey after someone read it
Open tracking works through images. If your recipient's mail app blocks images (some corporate setups, or 'ask before displaying images' in Gmail), the open can't register. That's a limit of every email tracker — we'd rather show you an honest grey than guess.
The reverse is protected too: security scanners that 'open' your email before a human sees it are filtered out and labeled, not counted. See Bots and scanners.
Did this answer it? If not, email support — a human replies, usually within a day.