Yahoo IMAP settings: connect your mailbox and fix login errors

What are Yahoo Mail's IMAP and SMTP settings?

These are the settings used by Mailera's Yahoo connection. Yahoo's official IMAP settings, reviewed on 25 October 2026, list incoming port 993 and outgoing ports 465 or 587. Yahoo's page lists SSL as required for outgoing mail but doesn't split that by port. The table above reflects Mailera's specific configuration: port 587 with STARTTLS.

IMAP accesses and synchronizes your mailbox; SMTP handles outgoing mail. Receiving a message therefore doesn't establish that sending works. Yahoo also notes that with IMAP, moving or deleting mail in an app moves or deletes it on the server too — a two-way sync. Choose IMAP for this setup rather than switching to POP while troubleshooting.

For a non-Yahoo server, use the Mailera IMAP and SMTP connection page instead of copying Yahoo's hosts.

What password should you use for Yahoo IMAP?

For manual setup, use a generated Yahoo app password, not your usual Yahoo account sign-in password. Mailera's Yahoo connection requires that app password.

Yahoo describes app passwords as credentials for third-party email apps that don't use Yahoo's sign-in page. An app's built-in Yahoo sign-in option is a different flow; don't assume every app will ask you to paste an app password.

Generate a Yahoo app password

These steps are based on Yahoo's app-password instructions, reviewed on 25 October 2026:

1. Sign in to your Yahoo Account Security page using the route in Yahoo's instructions.
2. Under "External connections," choose "Create app password."
3. Enter the app's name, such as Mailera.
4. Choose "Generate password."
5. Use the generated password in your email app's password field.
6. Choose "Done" in Yahoo.

Keep the generated value private. If you need to describe your setup in a support request, say "my Yahoo app password" rather than pasting the credential. Hide it in screenshots and remove it from logs. You can review Mailera's security information before connecting the account.

If Yahoo won't let you create an app password, follow its guidance rather than weakening your account security. Yahoo recommends using a browser you've used to sign in for several consecutive days and avoiding Incognito mode. Its customer care team cannot override app-password creation eligibility. If that advice doesn't help, Yahoo directs you to webmail or the official Yahoo app.

Changing your main Yahoo password does not deactivate existing app passwords. To revoke one, open the app-password list under "External connections," choose "Delete" beside the relevant password, then choose "Delete" again to confirm. For more on managing these credentials across mailbox connections, see the app-password guide.

How do you add Yahoo Mail to an email app?

Use this sequence when your app asks for manual server settings:

1. Add an email account and choose IMAP.
2. Enter your full Yahoo email address as the username, including the domain.
3. Set the incoming server to imap.mail.yahoo.com, port 993, with SSL/TLS.
4. Enter your generated Yahoo app password.
5. Set the outgoing server to smtp.mail.yahoo.com, port 587, with STARTTLS.
6. Enable outgoing authentication and supply your full Yahoo address and app password there too.
7. Save the account and check both directions with new messages.

For the receiving test, send a new message to Yahoo from another account you control. Use a recognizable subject, such as Yahoo connection test, then look for it in the connected app. For the sending test, reply from that app and check the other account for the reply. Don't stop at a successful sign-in screen.

If you're looking for Yahoo IMAP settings for Outlook or Apple Mail, use the same Yahoo server values when entering manual settings. Follow the app's Yahoo sign-in flow instead if that's the option you selected.

Also distinguish the app from the mailbox provider. A Yahoo account opened in Outlook still uses Yahoo settings. For an Outlook-hosted address, see Outlook IMAP and SMTP settings; for a Google-hosted address, use the Gmail IMAP and SMTP settings guide.

How do you connect Yahoo Mail to Mailera?

You need an Admin or Leader role to add a mailbox. Have your Yahoo app password ready, then follow the single-mailbox flow:

1. Open Mailboxes → Add mailbox → One mailbox.
2. Enter your address in Email address. Confirm Yahoo is detected, or select Yahoo under Or choose a provider. Choose Continue.
3. Review How to get an app password and What you'll need.
4. Under Connection details, paste the generated credential into Password. You can also set Display name and Mailbox group.
5. Choose Test & connect.

The test includes Incoming server sign-in, Folder detection, and Outgoing server sign-in. (For Yahoo, this step runs automatically since both incoming and outgoing servers are set from the provider flow.) If you need to leave the page, Run in background lets the test continue and saves the mailbox when it finishes.

Test & connect does not send an email. It checks the connection, not end-to-end delivery. After setup, perform the separate receive-and-reply test described above.

If you see Can receive email, but cannot send yet, choose between two paths:

• Use Edit details, correct the outgoing credentials or settings, and choose Test again.
• Choose Save as receive-only if you only need to read mail for now. Treat outgoing mail as unfinished, not fixed.

After the success message, open the mailbox and inspect the newly loaded messages. Mailera initially loads messages within its retention period, newest first; initial loading is not a complete archive import.

The Yahoo provider page describes this connection option. For Yahoo mailboxes, Mailera's sign-in status is based on the latest sync. A status indicator alone isn't a sending test.

Why is Yahoo IMAP not responding? Common errors and fixes

Start with the failing stage. A rejected password, a connection timeout, and a missing message need different checks.

Don't keep submitting the same rejected password. Confirm which credential the app expects first. Likewise, don't turn off encryption to make a timeout disappear; retain the port/security pairing shown above.

If a message is absent from both Yahoo webmail and the connected app, first establish whether Yahoo received it. If it's visible in Yahoo but missing from the app, focus on folders and synchronization rather than changing the SMTP password.

For Yahoo mailboxes, Mailera's sign-in status is based on the latest sync, not a fresh direct authentication check. Read that status together with the last sync time. Background checks vary with activity: active mailboxes are checked more often, while inactive mailboxes can sleep and wake on use. Mailera does not guarantee instantaneous synchronization.

What does Mailera not do for a Yahoo account?

Mailera connects an existing Yahoo mailbox; it does not create a new Yahoo address. You still need valid Yahoo credentials, and Yahoo controls whether app-password creation is available for your account.

Use the connection test to establish access, then use actual messages to check receiving and sending. If you saved the mailbox as receive-only, keep that limitation in mind before relying on it for replies.