Where I write

Your account email is already one

You never have to set anything up to be told. The address you signed in with is where I write, and it does not count towards your plan's number of destinations. The moment you add and confirm another email address, I use that one instead.

One message is about your account rather than about a project, and it always goes to the address you signed in with: if you move to a smaller plan and end up with more projects than the plan covers, I write once to say so and list the plans, and then not again unless it happens again.

The oldest projects stay covered first. Within each covered project, the active checks you added first stay covered first too. Newer projects and checks above the limits stay saved but paused by the plan. Archive a project, turn off a check, or pick a bigger plan to change what fits. Nothing is deleted, archived, or turned off automatically.

To sign in with a different address, press Change next to Sign-in email on Account & privacy in your settings. Nothing moves until both addresses agree: I first send a link to the address you sign in with now, and only once that one approves do I send a link to the new address to confirm it. Each of those links is good for 24 hours and works once. Until the new address confirms, the old one stays your sign-in and keeps getting your messages. Once it does, every other device signed in to your account is signed out, the browser you asked from stays signed in, and I write once to the old address to say the change happened.

The sign-in email also carries a six-digit code. Open the link, or type the code on the page you asked from — either way works once, for 15 minutes, and using one turns off the other. After three wrong tries the code stops working; press Send the link again for a new link and a new code.

An account connected to GitHub can't change its email here: signing in with GitHub has to keep leading to the same address.

Adding somewhere else

In your settings, on Alerts under Where I write, you can add an email address, a Slack or Discord channel, or your own endpoint. How many you may have at once depends on your plan — see pricing.

For Slack and Discord, paste the incoming webhook URL that the channel gave you. I accept those two hosts only, matched exactly, because a URL that merely looks like Slack is a URL pointing somewhere else.

Every destination confirms itself first

The moment you add one, I send a single message to it carrying a confirmation link and nothing about you — no project name, no address, no check. An email, Slack or Discord message also says which kinds of message would follow. Someone has to open that link and answer Yes, send me alerts. Until they do, I write nothing there at all.

This is not ceremony. Anyone can type an address they do not own into a form; the round trip is what proves the place I am about to write to actually wanted to hear from me. It is also why the link needs a real click: link scanners in mail systems open every URL they are sent, so opening it is deliberately not enough on its own.

For an endpoint of your own, the confirmation link arrives in the body of a request rather than in an inbox — your own webhook shows what that request looks like and where to find the link in it.

If the link stops working

A confirmation link is good for 24 hours and can be used once. If you missed it, press Resend next to the destination in your settings. That sends a fresh link and stops the old one working — so you never have to remove the destination and add it back, which for an endpoint would issue a new signing secret and mean redeploying your receiver.

You can do that a few times a day per destination, counted for that destination across every account on this product. It is the ceiling on how much post can reach somebody who never asked for any, so it applies to the first message and to every one after it.

Stopping from the other side

Every email I send to an address someone confirmed ends with Stop these emails. Whoever reads it can press that, answer once more on the page it opens, and I stop writing there — no account needed, and no need to ask the person who added them. Mail apps that offer their own unsubscribe button use the same way out.

The confirmation link has one too. The page it opens has No, this wasn’t me next to the button that confirms. Pressing it takes the address off these alerts on the spot, and I send nothing there — no confirmation, no goodbye, no word to anyone.

In your settings that address then says They asked me to stop. I won't write there. and has no Resend — asking again is not yours to do. If they change their mind, remove the address and add it back: that sends one new confirmation link, and nothing else reaches them until they answer it. Your account email has no such link — you turn things off in your settings instead.

Removing one

Remove takes effect immediately and needs no confirmation of its own. If the one you removed was your only confirmed email address, I go back to writing to your account email — you are never left with nowhere to be told.