In Winnr go to Email Users → Export, choose Mailshake, click Export, then Download CSV. In Mailshake, add a mail account, choose CSV Bulk Import and upload the file. The file sets a daily limit of 15 and leaves Mailshake's warm-up off, so a mailbox Winnr warms is not warmed twice.
Mailshake is an email-outreach platform with sequences, reply detection and optional warm-up. Winnr provisions and warms the mailboxes; Mailshake runs the campaigns.
Sending limits
Keep cold sending at 10 to 20 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
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. Search or the Domain filter help you find them. If nothing is ticked, the export includes every mailbox in your account.
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2. Export in the Mailshake format
Click Export, choose Mailshake under Export Format (type in the search box to find it quickly), then click the Export button.
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3. Download the CSV
Click Download CSV as soon as it appears. The link expires after 15 minutes, so if it has expired just run the export again. The file holds mailbox passwords in plain text, so keep it private.
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4. Check warm-up and limit
The file sets daily_limit to 15 and warmup_enabled to FALSE. If Mailshake does the warming instead of Winnr, change warmup_enabled to TRUE.
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5. Upload with CSV Bulk Import
In Mailshake, add a mail account and choose CSV Bulk Import, then upload the file.
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6. Confirm every mailbox connected
Once the import finishes, check each mailbox's connection status in Mailshake before adding it to a campaign.
Frequently asked questions
What is in the Mailshake file?
email_address, from_name, smtp_host, smtp_port, smtp_username, smtp_password, imap_host, imap_port, imap_username, imap_password, warmup_enabled and daily_limit.
What daily limit does the file set?
The daily_limit column is pre-filled with 15, the recommended cold-sending default. Keep cold campaigns at 10 to 20 per mailbox per day and each mailbox's total, cold plus warming, at 50 or under. Change it before you import, or in Mailshake afterwards.
Should I use Mailshake'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 Mailshake's warmup off so the mailbox is not warmed twice and stays at 50 emails a day or less in total. The export sets warmup_enabled to FALSE; change it to TRUE only if Mailshake is doing the warming instead of Winnr.
Does Mailshake need IMAP?
Yes. Mailshake uses SMTP to send and IMAP to detect replies. The Winnr export includes both.
What connection settings are in the file?
Each row carries that mailbox's own SMTP host (port 465, SSL) and IMAP host (port 993, SSL). The username is the full email address, and the same password works for SMTP and IMAP. Mailboxes on different domains can use different hosts, so keep the values from each row rather than copying one host across every mailbox.
Some mailboxes failed to connect. What now?
The usual cause is an old password: a password changed in Winnr after the export will not match the file. Export those mailboxes again and re-import them. If a fresh export still fails, see the mailbox authentication troubleshooting guide.