Slack + MailOdds
Validate emails with slash commands and get validation alerts in your Slack channels. Keep your team informed on email quality.
Prerequisites
- MailOdds account with API key
- Slack workspace with admin access
- Zapier, Make, or n8n account
Slack Use Cases
Slash Command Validation
Type /validate user@example.com in any channel to check an email instantly during sales calls.
Hot Lead Alerts
Get notified when MailOdds detects a hot lead from engagement events, with rich Block Kit formatting.
Bounce/Deferral Alerts
Receive real-time alerts when emails bounce or are deferred, with diagnostic details.
Daily Health Digest
Schedule automated daily reports on validation health and deliverable rates posted to a channel.
How to Connect
n8n: Slack Slash Command Workflow
JSON// n8n Webhook - Slack Slash Command /validate
// 1. Webhook node receives POST from Slack
// 2. Extract email from command text
// 3. HTTP Request to MailOdds API
// 4. Format response as Slack Block Kit message
// 5. Reply to Slack webhook
// POST to https://api.mailodds.com/v1/validate
// Body: { "email": "{{ $json.text }}" }
// Slack response format:
{
"response_type": "ephemeral",
"blocks": [
{
"type": "section",
"text": {
"type": "mrkdwn",
"text": "*Email Validation Result*\n\nEmail: user@example.com\nStatus: valid\nAction: accept\nScore: 0.95"
}
}
]
}Zapier: Bulk Job Slack Alert
JAVASCRIPT// Zapier: Send Slack Alert for Invalid Emails
// Trigger: MailOdds bulk job webhook (job.completed)
// Filter: Only continue if invalid count > threshold
// Action: Send Slack Channel Message
// Message template:
// :warning: *Email Validation Alert*
// Job `{{job_id}}` completed with {{summary.invalid}} invalid emails.
// Valid: {{summary.valid}} | Invalid: {{summary.invalid}}
// <{{results_url}}|View Full Results>Hot Lead Alerts
Receive real-time Slack alerts when MailOdds detects a hot lead from intent.hot_lead webhook events. Route to your sales channel with rich Block Kit formatting so your team can act immediately.
n8n: Hot Lead Alert for Slack
JAVASCRIPT// n8n Function Node - Format Hot Lead Alert for Slack
const payload = $json;
return {
blocks: [
{
type: "header",
text: { type: "plain_text", text: "Hot Lead Detected" }
},
{
type: "section",
fields: [
{ type: "mrkdwn", text: "*Email:*\n" + payload.to },
{ type: "mrkdwn", text: "*Event:*\n" + payload.event },
{ type: "mrkdwn", text: "*Score:*\n" + (payload.score || "N/A") },
{ type: "mrkdwn", text: "*Time:*\n" + payload.timestamp }
]
},
{
type: "actions",
elements: [{
type: "button",
text: { type: "plain_text", text: "View in Dashboard" },
url: "https://mailodds.com/dashboard"
}]
}
]
};Bounce and Deferral Alerts
Get notified when emails bounce or are deferred. Trigger on message.bounced and message.deferred webhook events and post diagnostic details to your ops channel.
Understanding is_bot and is_mpp in Webhook Events
is_bot = true when the event came from a security scanner, link prefetcher, or corporate email gateway (not a human). Common with Barracuda, Proofpoint, and Mimecast.
is_mpp = true when the event came from Apple Mail Privacy Protection, which pre-fetches all images and inflates open counts. Affects roughly 50% of iOS/macOS mail users.
Both fields are Booleans on engagement events (opened, clicked). Always guard with == true since they may be absent on non-engagement events.
n8n: Bounce Alert for Slack
JAVASCRIPT// n8n Function Node - Format Bounce/Deferral Alert for Slack
const payload = $json;
return {
blocks: [
{
type: "section",
text: {
type: "mrkdwn",
text: "*Email Bounce Alert*\n*To:* " + payload.to + "\n*Type:* " + (payload.bounce_type || "unknown") + "\n*Message ID:* `" + payload.message_id + "`"
}
}
]
};Daily Telemetry Digest
Schedule a daily digest from GET /v1/telemetry/summary and post a formatted health report to your team channel. Track validation counts, deliverable rates, and credit usage over time.
Zapier: Daily Telemetry Digest for Slack
JAVASCRIPT// Daily Telemetry Digest for Slack
const response = await fetch('https://api.mailodds.com/v1/telemetry/summary', {
headers: { 'Authorization': 'Bearer YOUR_API_KEY' }
});
const data = await response.json();
return {
blocks: [
{
type: "header",
text: { type: "plain_text", text: "Daily Email Health Report" }
},
{
type: "section",
fields: [
{ type: "mrkdwn", text: "*Total Validations:*\n" + data.totals.validations },
{ type: "mrkdwn", text: "*Deliverable Rate:*\n" + data.rates.deliverable + "%" },
{ type: "mrkdwn", text: "*Credits Used:*\n" + data.totals.creditsUsed },
{ type: "mrkdwn", text: "*Period:*\n" + data.period }
]
}
]
};Frequently Asked Questions
Troubleshooting
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