Start with the right service
Mailbird connects to a mailbox you already own. A Mailbird application issue is different from a mailbox-provider restriction, so test the same address on the provider’s website first.
Configuration quick reference
| Reference | What to check |
|---|---|
| Connection and access | Settings depend on the mailbox provider. Microsoft-hosted accounts require supported modern authentication. |
| Account authority | Use the original provider for identity verification, account recovery, eligibility and billing. |
Official reference: Mailbird account setup. Check the provider’s current instructions before changing settings. Reviewed October 14, 2026.
Work through the problem
- Check the address in the provider’s webmail and confirm you can send and receive there.
- Use the matching provider option when adding the account to Mailbird; complete the official authorization window yourself.
- For manual setup, copy the incoming and outgoing settings from the mailbox provider, not from another Mailbird account.
- If authorization fails, record the error and consult Mailbird’s account-setup documentation before deleting the account.
Keep a useful diagnostic record
Note the exact error, the application and version, and whether the same account works on the provider’s website. Record whether sending, receiving or sign-in fails. Remove private message content from screenshots before sharing them.
If you use POP or local folders, preserve those messages before removing an account. A new account configuration may not recover data stored only on the old device.
Choose your next step
For an app-only problem, compare authorization and settings with the official reference above. For an account restriction or failed identity check, continue with the original provider. Independent assistance cannot bypass these controls.
Related guides: IMAP, POP and SMTP · Password recovery · Email synchronization.