In Winnr go to Email Users → Export, choose Smartlead, click Export, then Download CSV. In Smartlead, open Email Accounts, add accounts and use the bulk CSV upload for SMTP accounts. Match the columns to Smartlead's fields if it asks. The file has no daily-limit column, so set 10 to 20 cold emails per mailbox in Smartlead, and confirm every mailbox connects.
Smartlead is a cold-email sequencer with campaigns, a master inbox and its own warmup. Winnr provides the domains, mailboxes and warming; Smartlead handles campaigns, sequences and personalization. Smartlead's master inbox reads replies over IMAP and works alongside Winnr's own inbox.
What's in the Smartlead file
| Column | What Winnr puts in it |
|---|---|
| domain | The mailbox's domain |
| from_email | The full email address |
| from_name | The mailbox's display name |
| user_name | The full email address (SMTP login) |
| password | The mailbox password |
| smtp_host | That mailbox's mail server |
| smtp_port | 465 (SSL) |
| imap_host | That mailbox's mail server |
| imap_port | 993 (SSL) |
| imap_username | The full email address (IMAP login) |
| imap_password | The mailbox password (same as password) |
| footer | The mailbox's footer, usually empty |
Check before you upload
- Mapping. If Smartlead asks you to map columns, map user_name and password to its SMTP fields and imap_username and imap_password to its IMAP fields. domain is only for your reference and can be skipped.
- No daily limit or warmup columns. Smartlead applies its own defaults on import. Change the per-mailbox limit and warmup setting after upload.
- Hosts per row. Mailboxes on different domains can sit on different mail servers, so keep each row's own smtp_host and imap_host.
- Rows missing? Only mailboxes that finished being created are exported. Export again once new mailboxes show as active.
Daily limit in Smartlead
Set the per-mailbox limit in Smartlead after upload: 10 to 20 cold emails per mailbox per day (15 is a good default), and keep each mailbox's total, cold plus warming, at 50 or under. Warm new mailboxes for at least two weeks before they send cold, and longer on a brand-new domain.
What's next
- Turn on warming for new mailboxes
- Instantly setup
- EmailBison setup
- Fix a mailbox that will not connect
Step-by-step
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1. Select the mailboxes in Winnr
Open Email Users and tick the mailboxes you want for this campaign. To take one domain, filter by it and tick the header checkbox. With nothing ticked, the export includes every mailbox in your account.
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2. Export in the Smartlead format
Click Export, choose Smartlead under Export Format (the search box finds it quickly), then click the Export button.
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3. Download the CSV
Click Download CSV. The link lasts 15 minutes, so export again if it has expired. The file holds passwords in plain text, so keep it private.
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4. Upload to Smartlead
In Smartlead, open Email Accounts, add accounts and choose the bulk CSV upload for SMTP/IMAP accounts. Upload the file and match any columns Smartlead does not recognise, using the table on this page.
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5. Set limits and confirm
The file has no daily-limit column, so set each mailbox's daily limit in Smartlead. Check every mailbox shows as connected before adding it to a campaign.
Frequently asked questions
Is the Smartlead format different from Default?
No. Both have the same 12 columns in the same order. Choosing Smartlead simply makes the file easy to find later.
Do I need to warm before importing to Smartlead?
Warm new mailboxes for at least two weeks before cold sending. You can import them into Smartlead while they warm; just do not start campaigns yet.
Should I use Smartlead's warmup or Winnr's?
Pick one per mailbox. Winnr's built-in warming is $0.60 per mailbox per month; if you use it, keep Smartlead's warmup off so the mailbox is not warmed twice and stays at 50 emails a day or less in total.
Can I import again as I add mailboxes?
Yes. Export just the new mailboxes (tick them on Email Users) and upload that file, so you do not re-import accounts Smartlead already has.
Does sending through Smartlead use my Winnr dedicated IP?
Yes. Smartlead hands each message to the Winnr SMTP host in the file, so it goes out the same way as any other mail from your Winnr mailboxes, including through a dedicated IP if one is set up on your account.
Some mailboxes failed to connect in Smartlead. What now?
Check password and imap_password for those rows. A password changed in Winnr after the export will not match the file. Export those mailboxes again and re-upload them. If a fresh export still fails, see the mailbox authentication troubleshooting guide.