Verify Slack email addresses with Clearout
When someone shares an email in a Slack channel, Clearout checks whether it is deliverable so you can make the next move with more confidence.
Trigger
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Action
Instant Email Verifier
Tool to instantly verify a single email address. Use when you need real-time validation before processing an email.
Why this helps
Copying addresses into a separate checker interrupts the conversation and makes it easy to forget which ones were validated.
- Check an address while its context is still easy to find.
- Reduce manual copy and paste between Slack and Clearout.
- Get a verification result for follow-up decisions.
Setup
Build it in a few focused steps.
- 1Connect Slack and Clearout to Notis once in the portal.
- 2Create an automation in the portal or ask Notis for it conversationally.
- 3Tell Notis in plain language to verify email addresses shared in the chosen Slack channel using Clearout and report the result.
- 4Select Channel Message Received as the trigger, choose a run-report channel, then test with one real address.
Questions about this workflow
Does this run on every Slack message?
The trigger fires for channel messages. In your instruction, tell Notis to act only when a message contains an email address.
Does Clearout send an email?
No. This workflow checks the address and reports the result; it does not send outreach.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Clearout. A trigger fires from one place; an action lands in another.
Slack triggers
Clearout actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
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Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Business Account Verify
Tool to check if an email belongs to a business/work account. Use when validating corporate emails before onboarding.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Catch-All Verify
Tool to check if an email domain is catch-all. Use after confirming email validity.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
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Tool to check if an email is from a disposable provider. Use after acquiring an email address.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
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Tool to retrieve MX records for a domain in priority order. Use when you need to find a domain's mail servers (e.g., for email routing setup).
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Fetch Domain WHOIS Information
Tool to fetch WHOIS record for a domain. Use when you need WHOIS data for a domain.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Bulk Email Finder
Tool to upload a CSV or XLSX contacts file for bulk email finding. Use when you need to find emails for a list of contacts in bulk.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Cancel Bulk Email Finder Job
Tool to cancel a running bulk email finder job. Use when you need to stop an in-progress list scan before completion.
Connect any two apps with Notis in the middle.
Slack and Clearout, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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