Email Users → Export → Mailshake. Winnr downloads a CSV with each mailbox's SMTP and IMAP credentials in Mailshake's format. In Mailshake, add a mail account and choose CSV Bulk Import, then upload the file (under 5 MB). Mailshake connects each mailbox and emails you a per-account status when the import finishes.
Mailshake is an email-outreach platform with sequences, reply detection, and optional built-in warm-up. Winnr provisions and warms the mailboxes; Mailshake runs the campaigns.
What's next
Step-by-step
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1. Filter to the mailboxes you want to export
Open the Email Users page in Winnr. Filter by domain, tag, or warming status to narrow to just the mailboxes for this campaign.
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2. Click Export → Mailshake
Hit Export and pick Mailshake. Winnr builds a CSV matching Mailshake's template — SMTP and IMAP host, port, username, and password already mapped.
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3. Open Mailshake
Log into Mailshake and start adding a mail account. Mailshake offers Google, Microsoft, SMTP, and CSV Bulk Import as connection options.
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4. CSV Bulk Import
Choose CSV Bulk Import and upload the Winnr file (must be under 5 MB). Mailshake reads the SMTP and IMAP columns and connects each mailbox.
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5. Verify connection status
When the import completes, Mailshake emails you a list of the accounts and their connection status. Confirm each mailbox connected before adding it to a campaign.
Frequently asked questions
Where's the bulk import in Mailshake?
When adding a mail account, choose CSV Bulk Import — the fourth option alongside Google, Microsoft, and SMTP. Mailshake provides a template; the Winnr export already matches its fields.
Does Mailshake need IMAP?
Yes. Mailshake requires both SMTP (sending) and IMAP (receiving) to connect a mailbox and detect replies. Winnr exports both.
Is there a file size limit?
Yes — the uploaded CSV must be under 5 MB, which is plenty for typical mailbox counts. Mailshake emails you a per-account status once the import finishes.
Should I warm on Winnr first?
Yes. Mailshake can auto-enable warm-up on import, but if you're warming on Winnr ($0.60/mailbox/month), leave Mailshake's off to avoid double warming.