Post a message in Slack when a link in an email is clicked in Postmark

What each client fills in

Slack: Channel

For example #leads or C0123456789

Postmark: Message stream

The stream the emails go out on: “outbound” unless the server has others.

The accounts it needs

Each is the client’s own, stored encrypted and never copied between clients. Until one is added the client’s checklist shows it, and nothing runs.

• 

  Postmark → the client’s server → API Tokens → copy the Server API token. The From address must be a confirmed sender signature or on a verified domain.

• 

  In the client’s Slack: api.slack.com/apps → Create New App → OAuth & Permissions → add the chat:write scope (and channels:history, plus groups:history for a private channel, for the message trigger) → Install to Workspace → copy the Bot User OAuth Token. Invite the app to the channel.

After you install it

It lands switched off. The client’s checklist holds exactly this:

1. Connect the client’s Postmark, for “A link in an email is clicked”
2. Connect the client’s Slack, for “Post a message”
3. Fill in Postmark: Message stream (The stream the emails go out on: “outbound” unless the server has others)
4. Fill in Slack: Channel (For example #leads or C0123456789)
5. Confirm with the client: Link tracking is on in the client’s Postmark, for the server or for the emails that matter: an untracked link sends no click.