Bounces
Past 5% of addresses that do not exist, mailbox providers start filing you as spam. That is their published rule. We tell you the day you cross it.
Your email was sent. Nobody read it.
“98% delivered” does not tell you which one was refused, or why. LeTock delivers the mail itself: it resolves the recipient’s MX, opens the connection, and hands you the return code, address by address. It also receives, on your own addresses, and gives you an inbox to read it all in one place.
Complaints
“Report as spam”: 0.1% is enough. Three complaints in a day is worth an alert whatever the volume — nobody complains about a message they were expecting.
Opens, compared to the right day
A Monday looks nothing like a Saturday. We compare today’s open rate to the same weekdays over previous weeks — the Stats collapse detection, applied to email. If it halves: spam folder.
What it takes to set up
A domain proven by DNS, two records to paste — DKIM and SPF — and an MX record if you want to receive. The screen gives you the exact values, with whatever your domain answers today right beside them: replacing an existing MX would stop whatever arrives today from arriving, and it leaves no trace.
What we keep, and what we throw away
A received message is kept in full — that is what an inbox is. Its original raw form is thrown away after ninety days: it serves as proof, and proof has a useful life. The body stays readable afterwards. On third-party monitoring we still keep no recipient, no subject, no content: the domain, the kind of event, the moment.
An inbox, and unlimited addresses
contact@your-domain.com that really receives, created in ten seconds. As many addresses as you want, on every plan: an address is not a seat — no password, no account recovery, no per-person support. Hosts bill a whole account and call it a mailbox; the proof is that aliases are free with them. We count the volume received, not the addresses.