On the Email Users page, click the mailbox row to open its detail panel. The Display Name field is editable — change it and save. Takes effect on the next sent email. To change the email address itself (local part @ domain), use Replace Usernames: select the mailbox(es) and click Replace Usernames in the selection bar — Winnr deletes and recreates each mailbox with the new address.
When to rename vs. replace
Rename Display Name — quick, safe, no sending disruption. Do this if you want to change how the sender appears in the recipient's inbox.
Replace Usernames — needed when the email address itself needs to change (e.g., you want sam.chen@ instead of samc@). Winnr handles the delete-and-recreate for you in bulk — see Replace mailbox usernames. Consequences to know:
- All messages stored in the old mailbox are permanently deleted.
- New passwords are generated — any sending tool using the old mailbox needs updated credentials.
- Warming restarts on the new address (re-enabled automatically if it was on).
What's next
Step-by-step
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1. Open the mailbox
Click the row in the Email Users list.
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2. Edit Display Name
The Display Name field is at the top of the detail panel. Edit and save.
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3. Rotate password (optional)
Also on the detail panel — click Reveal to see the current password, or Rotate to generate a new one. If you rotate, remember to update any sending tool that has the old password.
Frequently asked questions
Can I rename the email address itself?
Not in place — the local part is baked into IMAP/SMTP authentication and the mailbox's identity with email providers. Use Replace Usernames (select the mailboxes → Replace Usernames in the selection bar), which deletes and recreates each mailbox with the new address in one guided flow. Messages in the old mailbox are lost and new passwords are issued.
Does changing display name affect deliverability?
Not directly. Filters key on the email address and sender reputation. But recipients see the display name — a more human name in From helps open rates.
How do I rotate the password?
Mailbox detail panel → Rotate Password button. Winnr generates a new one and shows it once. Update any sending tools using the mailbox.