Email Link Preview Customization
When emails are posted to Slack, make their links show rich previews so your team understands context instantly.
Trigger
New Email Received
Trigger for new emails in an AgentMail inbox
Action
Customize URL unfurl
Customizes url previews (unfurling) in a specific slack message using a url-encoded json in `unfurls` to define custom content or remove existing previews.
Why this helps
Someone posts an email with a link to Slack. Your team has to click it to know what it is. It's an extra friction point that delays understanding.
- Context is visible without clicking—your team understands the email immediately
- Custom previews highlight the most important information, not just a generic title
- Reduced friction means faster decisions and fewer follow-up questions
- Professional appearance shows clients and team what matters
Setup
Build it in a few focused steps.
- 1Connect Agent mail and Slack to Notis.
- 2Tell Notis: 'When an email is posted to Slack, customize the link preview to show the sender, subject, and key details.'
- 3Set the trigger to New Email Received.
- 4Define what should appear in the preview (sender, subject, date, attachment count, etc.).
- 5Test by posting an email with links to Slack and verifying the custom preview appears.
Questions about this workflow
Can I customize previews for different email types?
Yes. Invoices show payment terms, contracts show signature date, etc. You define the rules in your prompt.
What if the email has multiple links?
Notis can customize all of them or just the primary one, depending on your preference.
Does this work with external links in emails?
Yes. Any link in the email can be enhanced when it's posted to Slack.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Agent mail to Slack. A trigger fires from one place; an action lands in another.
Agent mail triggers
Slack actions
New Email Received
Trigger for new emails in an AgentMail inbox
Set snooze duration
Deprecated: turns on do not disturb mode for the current user, or changes its duration. use `set dnd duration` instead.
Add a custom emoji to a Slack team
Deprecated: adds a custom emoji to a slack workspace given a unique name and an image url. use `add emoji` instead.
Add an emoji alias
Adds an alias for an existing custom emoji in a slack enterprise grid organization.
Add a remote file
Adds a reference to an external file (e.g., google drive, dropbox) to slack for discovery and sharing, requiring a unique `external id` and an `external url` accessible by slack.
Add a star to an item
Stars a channel, file, file comment, or a specific message in slack.
Add call participants
Registers new participants added to a slack call.
Add emoji
Adds a custom emoji to a slack workspace given a unique name and an image url; subject to workspace emoji limits.
Add reaction to message
Adds a specified emoji reaction to an existing message in a slack channel, identified by its timestamp; does not remove or retrieve reactions.
Connect any two apps with Notis in the middle.
Not just Agent mail and Slack. Any combination from 985+ integrations.
When this happens · Trigger
Do this · Action
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