In Winnr go to Email Users → Export, choose SendKit, click Export, then Download CSV. The file has each mailbox's address, password, display name and SMTP and IMAP host and port, with secure connections on. Upload it with SendKit's import for SMTP/IMAP mailboxes, then set each mailbox's daily limit there.
SendKit is a cold-email sequencer that connects any SMTP/IMAP mailbox and includes its own warmup. Winnr provisions and warms the mailboxes; SendKit runs the sequences.
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
-
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.
-
2. Export in the SendKit format
Click Export, choose SendKit under Export Format (type in the search box to find it quickly), then click the Export button.
-
3. Download the CSV
Click Download CSV as soon as it appears. The link is short-lived, so if it has expired just run the export again. The file holds mailbox passwords in plain text, so keep it private.
-
4. Add the mailboxes in SendKit
In SendKit, use its import for SMTP/IMAP mailboxes and upload the Winnr file.
-
5. Set limits, warmup and confirm
The file has no daily-limit column, so set each mailbox's limit in SendKit, and decide whether SendKit or Winnr does the warming. Check every mailbox connected before starting a sequence.
Frequently asked questions
What is in the SendKit file?
email, password, displayName, smtpHost, smtpPort, smtpSecure, imapHost, imapPort and imapSecure. Both Secure columns are true.
What daily limit should I set?
10 to 20 cold emails per mailbox per day (15 is a good default), and 50 or under in total including warming.
Should I use SendKit'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 SendKit's warmup off so the mailbox is not warmed twice and stays at 50 emails a day or less in total.
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.