On the Email Users page, click the pencil (Edit) icon on the mailbox's row. In the Edit Email User dialog, change the Display Name and/or type a New Password (at least 8 characters; leave it empty to keep the current one), then click Save Changes. To give many mailboxes the same sender name, tick them and click "Edit Name (N)". To change the email address itself, use Replace Usernames, which deletes and recreates the mailbox with the new address.
When to rename vs. replace
Edit the display name: quick, safe, no sending disruption. Do this when you only want to change how the sender appears in the recipient's inbox.
Replace Usernames: needed when the address itself has to change (for example sam.chen@ instead of samc@). Winnr handles the delete-and-recreate for you, in bulk. See Replace mailbox usernames. What to know first:
- All messages stored in the old mailbox are permanently deleted.
- New passwords are generated, so every sending tool using the old mailbox needs the new credentials.
- The display name carries over to the new mailbox.
- Warming restarts on the new address (re-enabled automatically if it was on).
Changing a password
A password change is applied in the background within moments. Update everything that uses the mailbox (a sequencer, a mail client, an automation) to the new password, because the old one will stop working. Export the credentials again if your tool imports from a file.
If warming is on for the mailbox, you don't need to do anything for warming: Winnr passes the new password on automatically and warming keeps its history. In the rare case the Warming page shows Problem for the mailbox afterwards, open the "..." menu on its row there and click Reconnect.
What's next
Step-by-step
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1. Open Email Users
App sidebar → Email Users. Find the mailbox with search or the Domains filter.
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2. Click Edit
Click the pencil icon in the row's Actions column. The Edit Email User dialog opens.
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3. Change the display name
Edit the Display Name field. This is the name recipients see in the From field.
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4. Optionally change the password
Type a new password in New Password (at least 8 characters), or leave it empty to keep the current one.
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5. Save
Click Save Changes. If you changed the password, update every sending tool or mail client that uses this mailbox. Warming picks up the new password automatically.
Frequently asked questions
Can I change the email address itself?
Not in place. A mailbox can't be renamed, so use Replace Usernames (tick the mailboxes → "Replace Usernames (N)" in the selection bar). It deletes each mailbox and creates a new one with the new address in one guided flow. Messages in the old mailbox are lost and new passwords are issued. See [Replace mailbox usernames](/help/mailboxes/replace-usernames.html).
How do I set the same sender name on lots of mailboxes?
Tick them on the Email Users page and click "Edit Name (N)" in the selection bar. Enter the sender name and save. Addresses and passwords aren't changed.
Does changing the display name affect deliverability?
Not directly. Filters look at the address and the sender's reputation. Recipients do see the display name, and a real person's name tends to get more opens than a company or role name.
Where can I see the current password?
In the Password column on the Email Users page. Click the eye icon to show it or the copy icon to copy it.
Do I need to update warming after changing a password?
No. If warming is on for the mailbox, Winnr passes the new password to warming automatically, usually within a minute. Warming keeps its history and carries on.
I changed a password and now warming shows Problem. What do I do?
On the Warming page, open the "..." menu on the mailbox's row and click Reconnect. It sends the mailbox's current password to warming and restarts it, keeping its warming history. If Reconnect says it can't sign in, check the password on the Email Users page, then try again.