In Winnr go to Email Users → Export, choose WarmySender, click Export, then Download CSV. In WarmySender, use its bulk mailbox import to upload the file. The file turns WarmySender's warmup on and sets a daily limit of 50, so review both columns before you upload.
WarmySender is a cold-email tool with built-in warmup. Winnr provisions and warms the mailboxes; WarmySender 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 WarmySender format
Click Export, choose WarmySender 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 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.
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4. Review warmup and limit
The file sets warmup_enabled to TRUE, daily_limit to 50 and timezone to UTC. If you warm with Winnr, change warmup_enabled to FALSE, and lower the daily limit to fit your cold volume.
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5. Upload to WarmySender
In WarmySender, use the bulk (CSV) import for SMTP/IMAP mailboxes and upload the file.
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6. Confirm every mailbox connected
Check every mailbox shows as connected before adding it to a campaign.
Frequently asked questions
What is in the WarmySender file?
from_name, email, smtp_host, smtp_port, imap_host, imap_port, username, password, daily_limit, timezone and warmup_enabled. username is the full email address and one password covers SMTP and IMAP.
What daily limit does the file set?
The daily_limit column is pre-filled with 50. Treat 50 as the ceiling for everything a mailbox sends in a day, not a cold-sending target: set cold campaigns to 10 to 20 per mailbox per day (15 is a good default) before you import, or in WarmySender afterwards.
Should I use WarmySender'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 WarmySender'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 TRUE, so change it to FALSE if Winnr is doing the warming.
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.