← All Newsletter & ESP Workflows
BillionVerifyDrip
Send timezone-aware drip emails with Gmail and Google Sheets using daily limits
Pull contacts, verify each address with BillionVerify, and continue to Drip — only deliverable addresses get through.
Why verify before the send
Sending to invalid, risky, catch-all, or disposable addresses spikes your bounce rate and erodes sender reputation. A verification gate before the Drip step removes that risk automatically — only deliverable addresses continue, the rest are flagged.
The workflow
BillionVerify — verification sits right before the send.
Node by node
- 1Trigger EU_UK 10:00 UTCTrigger· n8n
Starts the workflow — on a schedule, a webhook, or manually while you test.
- 2Trigger NA 18:00 UTCTrigger· n8n
Starts the workflow — on a schedule, a webhook, or manually while you test.
- 3Trigger AU 1:00 UTCTrigger· n8n
Starts the workflow — on a schedule, a webhook, or manually while you test.
- 4Determine GroupSource· n8n
Provides or transforms the contact data flowing through the workflow.
- 5Read ContactsSource· n8n
Provides or transforms the contact data flowing through the workflow.
- 6Filter and LimitSource· n8n
Provides or transforms the contact data flowing through the workflow.
- 7Build EmailSource· n8n
Provides or transforms the contact data flowing through the workflow.
- 8Verify Email (BillionVerify)Verify· billionverify
The BillionVerify node verifies the address — status (valid / invalid / risky / catch-all / role / disposable), is_deliverable, and a confidence score — before anything is sent.
- 9IF deliverableLogic· n8n
Branches on the verification result: only deliverable addresses continue to the send; the rest are skipped and flagged.
- 10Send GmailSend· n8n
Sends only to verified, deliverable addresses. Swap in your own provider node if you send elsewhere.
- 11Update Row SuccessSource· n8n
Provides or transforms the contact data flowing through the workflow.
- 12Update Row ErrorSource· n8n
Provides or transforms the contact data flowing through the workflow.
Workflow JSON
Copy or download this workflow, then import it in n8n (Workflows → Import from File / Paste). Install the BillionVerify community node first, then add your API key credential.
verify-emails-in-drip.json
{
"name": "Send timezone-aware drip emails with Gmail and Google Sheets using daily limits + BillionVerify",
"nodes": [
{
"id": "ab68acee-89bb-46ca-8639-beb8b3040e75",
"name": "Trigger EU_UK 10:00 UTC",
"type": "n8n-nodes-base.scheduleTrigger",
"position": [
-608,
304
],
"parameters": {
"rule": {
"interval": [
{
"field": "cronExpression",
"expression": "0 10 * * 1-5"
}
]
}
},
"typeVersion": 1.2
},
{
"id": "10a49736-3249-4683-ac02-91cdd36f2683",
"name": "Determine Group",
"type": "n8n-nodes-base.code",
"position": [
-416,
512
],
"parameters": {
"jsCode": "// Maps the current UTC hour to an audience region plus a daily send cap.\n// Ranges are non-overlapping so each trigger hits exactly one group.\nconst hour = new Date().getUTCHours();\nlet group, daily_limit;\n\nif (hour >= 9 && hour < 13) {\n // EU & UK working hours (morning Europe)\n group = 'EU_UK';\n daily_limit = 45;\n} else if (hour >= 14 && hour < 20) {\n // North America working hours (morning/midday NA)\n group = 'NA';\n daily_limit = 90;\n} else {\n // Remaining hours cover Australia / Asia-Pacific\n group = 'AU';\n daily_limit = 15;\n}\n\nreturn [{ json: { group, daily_limit } }];\n"
},
"typeVersion": 2
},
{
"id": "6693ed50-b9f3-47a9-8848-38f56e7a2be4",
"name": "Read Contacts",
"type": "n8n-nodes-base.googleSheets",
"position": [
-160,
512
],
"parameters": {
"options": {},
"sheetName": {
"__rl": true,
"mode": "list",
"value": "",
"cachedResultUrl": "",
"cachedResultName": ""
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "",
"cachedResultUrl": "",
"cachedResultName": ""
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"id": "",
"name": "Google Sheets account"
}
},
"typeVersion": 4.5
},
{
"id": "607a2e0f-f9f7-4056-8c83-45a3dfee211b",
"name": "Filter and Limit",
"type": "n8n-nodes-base.code",
"position": [
64,
512
],
"parameters": {
"jsCode": "const group = $('Determine Group').first().json.group;\nconst daily_limit = $('Determine Group').first().json.daily_limit;\n\nconst countryGroups = {\n 'Austria': 'EU_UK', 'Belgium': 'EU_UK', 'France': 'EU_UK',\n 'Germany': 'EU_UK', 'Italy': 'EU_UK', 'Netherlands': 'EU_UK',\n 'Norway': 'EU_UK', 'Spain': 'EU_UK', 'Sweden': 'EU_UK',\n 'Switzerland': 'EU_UK', 'United Kingdom': 'EU_UK',\n 'Canada': 'NA', 'United States': 'NA',\n 'Australia': 'AU'\n};\n\nconst filtered = items.filter(item => {\n const country = (item.json['Country'] || '').trim();\n const emailSent = (item.json['email_sent'] || '').toString().trim();\n const email = (item.json['Email'] || '').trim();\n return (\n countryGroups[country] === group &&\n emailSent === '' &&\n email.includes('@')\n );\n});\n\nreturn filtered.slice(0, daily_limit);"
},
"typeVersion": 2
},
{
"id": "2c74a24d-e217-4a71-a9aa-1a096e38c7ce",
"name": "Build Email",
"type": "n8n-nodes-base.set",
"position": [
288,
512
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "field-001",
"name": "to",
"type": "string",
"value": "={{ $json['Email'] }}"
},
{
"id": "field-002",
"name": "contact_email",
"type": "string",
"value": "={{ $json['Email'] }}"
},
{
"id": "field-003",
"name": "subject",
"type": "string",
"value": "=Quick question to {{ $('Read Contacts').item.json.Company }} Team"
},
{
"id": "field-004",
"name": "body",
"type": "string",
"value": "=<table role=\"presentation\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\" border=\"0\" style=\"margin:0;padding:0;background:#ffffff;\">\n <tr>\n <td align=\"left\" style=\"padding:0;margin:0;\">\n <div style=\"font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.55;color:#111111;\">\n <p style=\"margin:0 0 14px 0;\">Hi {{ $json['First Name'] }},</p>\n\n <p style=\"margin:0 0 14px 0;\">\n [Write your opening line here. Mention something specific about the recipient or their company.]\n </p>\n\n <p style=\"margin:0 0 14px 0;\">\n [Explain the problem you help solve, in one short paragraph.]\n </p>\n\n <p style=\"margin:0 0 14px 0;\">\n <strong>[Your product or service name]</strong> helps [target persona] to [outcome], without [common pain point].\n </p>\n\n <p style=\"margin:0 0 18px 0;\">\n Happy to share more if relevant - feel free to reply with <strong>\"yes\"</strong> and I will send details.\n </p>\n\n <p style=\"margin:0;border-top:1px solid #dddddd;padding-top:12px;font-size:14px;color:#444444;\">\n Best regards,<br><br>\n <strong>[Your Name] - [Your Company]</strong><br>\n [Your title]<br>\n <a href=\"https://example.com\" target=\"_blank\" style=\"color:#0066cc;\">https://example.com</a>\n </p>\n </div>\n </td>\n </tr>\n</table>"
},
{
"id": "field-005",
"name": "group_sent",
"type": "string",
"value": "={{ $('Determine Group').first().json.group }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "de7b7941-e2c4-4d39-bd6c-0477ee0b08fb",
"name": "Send Gmail",
"type": "n8n-nodes-base.gmail",
"onError": "continueErrorOutput",
"position": [
512,
512
],
"webhookId": "7acbd5af-ceff-48ce-a8fb-f51496218d0e",
"parameters": {
"sendTo": "={{ $json.to }}",
"message": "={{ $json.body }}",
"options": {
"senderName": "",
"appendAttribution": false
},
"subject": "={{ $json.subject }}"
},
"credentials": {
"gmailOAuth2": {
"id": "",
"name": "Gmail account 2"
}
},
"typeVersion": 2.1
},
{
"id": "fb630893-1e98-4cbe-afdb-4e54daae2004",
"name": "Update Row Success",
"type": "n8n-nodes-base.googleSheets",
"position": [
960,
352
],
"parameters": {
"columns": {
"value": {
"status": "sent",
"error_msg": "",
"sent_date": "={{ $now.toFormat('yyyy-MM-dd HH:mm:ss') }}",
"email_sent": "yes",
"group_sent": "={{ $('Determine Group').item.json.group }}",
"row_number": "={{ $('Read Contacts').item.json.row_number }}"
},
"schema": [
{
"id": "row_number",
"type": "number",
"display": true,
"removed": false,
"readOnly": true,
"required": false,
"displayName": "row_number",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "email_sent",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "email_sent",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "sent_date",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "sent_date",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "status",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "status",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "group_sent",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "group_sent",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "error_msg",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "error_msg",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "defineBelow",
"matchingColumns": [
"row_number"
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {},
"operation": "update",
"sheetName": {
"__rl": true,
"mode": "list",
"value": "",
"cachedResultUrl": "",
"cachedResultName": ""
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "",
"cachedResultUrl": "",
"cachedResultName": ""
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"id": "",
"name": "Google Sheets account"
}
},
"typeVersion": 4.5
},
{
"id": "f1f12bdd-cfe1-4d81-a3c2-60dfcf41630d",
"name": "Update Row Error",
"type": "n8n-nodes-base.googleSheets",
"position": [
960,
672
],
"parameters": {
"columns": {
"value": {
"status": "failed",
"error_msg": "={{ $json.error?.message || $json.error || 'Unknown error' }}",
"sent_date": "={{ $now.toFormat('yyyy-MM-dd HH:mm:ss') }}",
"email_sent": "no",
"group_sent": "={{ $('Determine Group').item.json.group }}",
"row_number": "={{ $('Read Contacts').item.json.row_number }}"
},
"schema": [
{
"id": "row_number",
"type": "number",
"display": true,
"removed": false,
"readOnly": true,
"required": false,
"displayName": "row_number",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "email_sent",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "email_sent",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "sent_date",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "sent_date",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "status",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "status",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "group_sent",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "group_sent",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "error_msg",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "error_msg",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "defineBelow",
"matchingColumns": [
"row_number"
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {},
"operation": "update",
"sheetName": {
"__rl": true,
"mode": "list",
"value": "",
"cachedResultUrl": "",
"cachedResultName": ""
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "",
"cachedResultUrl": "",
"cachedResultName": ""
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"id": "",
"name": "Google Sheets account"
}
},
"typeVersion": 4.5
},
{
"id": "48d24d3e-064b-4ec5-a905-a90cdf5edf5e",
"name": "Trigger NA 18:00 UTC",
"type": "n8n-nodes-base.scheduleTrigger",
"position": [
-608,
512
],
"parameters": {
"rule": {
"interval": [
{
"field": "cronExpression",
"expression": "0 18 * * 1-5"
}
]
}
},
"typeVersion": 1.2
},
{
"id": "d4309fb4-993f-47fe-9d1b-06cade209599",
"name": "Trigger AU 1:00 UTC",
"type": "n8n-nodes-base.scheduleTrigger",
"position": [
-608,
704
],
"parameters": {
"rule": {
"interval": [
{
"field": "cronExpression",
"expression": "0 01 * * 1-5"
}
]
}
},
"typeVersion": 1.2
},
{
"id": "0bb21b83-de9a-485c-a4c9-6a779da3ab4a",
"name": "Sticky Note 0001",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2576,
368
],
"parameters": {
"color": 7,
"width": 1600,
"height": 520,
"content": "## Timezone-aware email drip campaign (no wait nodes)\n\nSend outreach emails at the right working hour for each audience region, with a daily cap per region, status tracking in Google Sheets, and per-row error handling. No `Wait` nodes required - timing is driven entirely by three region-specific Cron schedules.\n\n### What it does\n- Three schedule triggers fire at the local working-hours window of each region (EU/UK, NA, AU)\n- A shared code node inspects the current UTC hour and picks the matching region + daily send limit\n- Reads your contact sheet, filters by country -> region mapping, skips rows already marked sent, and caps at the daily limit\n- Sends a personalised Gmail message\n- Writes `email_sent`, `sent_date`, `status`, `group_sent`, and `error_msg` back to the same row\n\n### Credentials required\n- **Google Sheets OAuth2** - reads contacts and writes status back\n- **Gmail OAuth2** - sends the outreach email\n\n### Setup (10-15 min)\n1. Create a Google Sheet with the columns listed in the \"Sheet schema\" sticky note\n2. In all three **Google Sheets** nodes, pick your sheet and the contacts tab\n3. Edit the **Build Email** node: replace the placeholder subject line and HTML body with your own copy\n4. In the **Send Gmail** node, set `senderName` to your name\n5. Optional: adjust the daily caps inside **Determine Group** (currently 45 / 90 / 15)\n6. Optional: edit the country -> region mapping inside **Filter and Limit** to match your contact list\n7. Activate the workflow\n"
},
"typeVersion": 1
},
{
"id": "252c415a-c310-417f-a7e0-c38b115781f3",
"name": "Sticky Note 0002",
"type": "n8n-nodes-base.stickyNote",
"position": [
-912,
208
],
"parameters": {
"color": 4,
"width": 200,
"height": 560,
"content": "## Step 1 - Three timezone-specific triggers\n\nThree independent `Schedule Trigger` nodes fire on weekdays (`Mon-Fri`):\n\n- **EU_UK** at 10:00 UTC (morning in Europe)\n- **NA** at 18:00 UTC (late morning on US East coast)\n- **AU** at 01:00 UTC (noon in eastern Australia)\n\nAll three feed into the same `Determine Group` node, so there is exactly ONE shared pipeline instead of three copies.\n\nEdit the cron expressions to match your preferred send windows."
},
"typeVersion": 1
},
{
"id": "0b27bf50-9c79-4eb0-bff8-c050874c9d32",
"name": "Sticky Note 0003",
"type": "n8n-nodes-base.stickyNote",
"position": [
-448,
16
],
"parameters": {
"color": 3,
"width": 200,
"height": 468,
"content": "## Step 2 - Determine region + daily cap\n\nReads the current UTC hour and returns:\n- `group`: one of `EU_UK`, `NA`, `AU`\n- `daily_limit`: max emails for that region today (default 45 / 90 / 15)\n\nRanges are non-overlapping so each trigger maps to exactly one region. Adjust the numbers here to change your send volume per region."
},
"typeVersion": 1
},
{
"id": "31ec967f-fd8a-4cb8-b9e4-6ad8086e08f8",
"name": "Sticky Note 0004",
"type": "n8n-nodes-base.stickyNote",
"position": [
-224,
160
],
"parameters": {
"color": 5,
"width": 200,
"height": 340,
"content": "## Step 3 - Read contacts from Google Sheets\n\nReads every row from your contacts tab. You must:\n1. Select your own spreadsheet in this node after import\n2. Pick the tab containing the contact list\n\nSee the \"Sheet schema\" sticky note for the exact columns expected."
},
"typeVersion": 1
},
{
"id": "e70bc4b8-84f0-4142-9d80-0f0a9d440b52",
"name": "Sticky Note 0005",
"type": "n8n-nodes-base.stickyNote",
"position": [
0,
-64
],
"parameters": {
"color": 6,
"width": 200,
"height": 568,
"content": "## Step 4 - Filter by region, skip already-sent, cap at daily limit\n\nFor the active `group`:\n- Matches each row's `Country` against the country -> region lookup in the code\n- Drops rows whose `email_sent` column is not empty\n- Drops rows without a valid `@` in the `Email` column\n- Slices the result down to the region's `daily_limit`\n\nAdd or remove countries in the `countryGroups` object inside this node to match your audience."
},
"typeVersion": 1
},
{
"id": "3b186678-144c-41d7-b769-7ee8c479453d",
"name": "Sticky Note 0006",
"type": "n8n-nodes-base.stickyNote",
"position": [
224,
-32
],
"parameters": {
"color": 4,
"width": 200,
"height": 524,
"content": "## Step 5 - Build personalised email\n\nA `Set` node assembles the outgoing email into these fields:\n- `to` - the recipient address\n- `subject` - subject line (supports expressions like `{{ $json['Company'] }}`)\n- `body` - HTML body (supports `{{ $json['First Name'] }}` and any other column)\n- `group_sent` - recorded later in the sheet for audit\n\nReplace the placeholder subject and HTML body with your own copy."
},
"typeVersion": 1
},
{
"id": "f8fa6bd7-e6fb-4108-a542-771b9b40f011",
"name": "Sticky Note 0007",
"type": "n8n-nodes-base.stickyNote",
"position": [
464,
128
],
"parameters": {
"color": 5,
"width": 200,
"height": 360,
"content": "## Step 6 - Send via Gmail\n\nSends through your connected Gmail account. Set `senderName` in the node options to your display name.\n\n`onError: continueRegularOutput` means a failed send does NOT stop the batch - the error object flows downstream so the failed row can be logged separately."
},
"typeVersion": 1
},
{
"id": "be031510-a25c-4085-9f4e-2b7b7d1b338f",
"name": "Sticky Note 0008",
"type": "n8n-nodes-base.stickyNote",
"position": [
848,
-16
],
"parameters": {
"color": 3,
"width": 300,
"height": 300,
"content": "## Step 7 - Success / error branching\n\nThe `IF` node checks whether the Gmail response contains an `error` object:\n- **true (error exists)** -> `Update Row Error` writes `status = failed` + the error message\n- **false (no error)** -> `Update Row Success` writes `status = sent`\n\nBoth branches match on the `Email` column so the right row is updated."
},
"typeVersion": 1
},
{
"id": "5a937088-6dd9-4406-a7a2-8d6540e33749",
"name": "Sticky Note 0009",
"type": "n8n-nodes-base.stickyNote",
"position": [
1216,
336
],
"parameters": {
"color": 6,
"width": 340,
"height": 556,
"content": "## Sheet schema\n\nCreate a tab (e.g. `Contacts`) with these columns in the first row:\n\n- `First Name`\n- `Company` *(used in the subject placeholder; optional if you rewrite the subject)*\n- `Email`\n- `Country` *(must match a key in the country -> region map)*\n- `email_sent` *(leave blank; filled by the workflow)*\n- `sent_date` *(leave blank)*\n- `status` *(leave blank)*\n- `group_sent` *(leave blank)*\n- `error_msg` *(leave blank)*\n\n### Supported countries out of the box\nEU_UK: Austria, Belgium, France, Germany, Italy, Netherlands, Norway, Spain, Sweden, Switzerland, United Kingdom\nNA: Canada, United States\nAU: Australia\n\nAdd more inside the `Filter and Limit` node."
},
"typeVersion": 1
},
{
"parameters": {
"operation": "verify",
"email": "={{ $json.to }}",
"additionalOptions": {}
},
"type": "n8n-nodes-billionverify.billionVerify",
"typeVersion": 1,
"position": [
152,
512
],
"name": "Verify Email (BillionVerify)",
"credentials": {
"billionVerifyApi": {
"id": "",
"name": "BillionVerify account"
}
}
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"id": "is-deliverable",
"leftValue": "={{ $json.is_deliverable }}",
"rightValue": "",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
}
}
]
}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
332,
512
],
"name": "IF deliverable"
}
],
"connections": {
"Send Gmail": {
"main": [
[
{
"node": "Update Row Success",
"type": "main",
"index": 0
}
],
[
{
"node": "Update Row Error",
"type": "main",
"index": 0
}
]
]
},
"Build Email": {
"main": [
[
{
"node": "Verify Email (BillionVerify)",
"type": "main",
"index": 0
}
]
]
},
"Read Contacts": {
"main": [
[
{
"node": "Filter and Limit",
"type": "main",
"index": 0
}
]
]
},
"Determine Group": {
"main": [
[
{
"node": "Read Contacts",
"type": "main",
"index": 0
}
]
]
},
"Filter and Limit": {
"main": [
[
{
"node": "Build Email",
"type": "main",
"index": 0
}
]
]
},
"Trigger AU 1:00 UTC": {
"main": [
[
{
"node": "Determine Group",
"type": "main",
"index": 0
}
]
]
},
"Trigger NA 18:00 UTC": {
"main": [
[
{
"node": "Determine Group",
"type": "main",
"index": 0
}
]
]
},
"Trigger EU_UK 10:00 UTC": {
"main": [
[
{
"node": "Determine Group",
"type": "main",
"index": 0
}
]
]
},
"Verify Email (BillionVerify)": {
"main": [
[
{
"node": "IF deliverable",
"type": "main",
"index": 0
}
]
]
},
"IF deliverable": {
"main": [
[
{
"node": "Send Gmail",
"type": "main",
"index": 0
}
],
[]
]
}
},
"settings": {
"binaryMode": "separate",
"executionOrder": "v1"
}
}When to use this
- Cleaning a list before a Drip send or sync.
- Protecting Drip deliverability and sender reputation.
- Keeping bounce rates low so your sending is never throttled.
FAQ
Why verify before sending in Drip?
Verifying first keeps your bounce rate low, which protects your sender reputation and your results.
How do I import this workflow?
Download the JSON, then in n8n go to Workflows → Import from File (or paste it). Install the BillionVerify community node and add your API key credential.
What happens to risky or catch-all addresses?
They are routed to the false branch and excluded from the send. You decide whether to retry, review, or drop them.
Add verification to your workflow
Create a free account, grab your API key, and stop bounces before they happen.
Get started free