Outlook’s automatic setup works well for large providers but often struggles with custom domains. This guide covers manual configuration, which is more reliable and not much slower.
Before you start
- Your full email address and password
- Incoming (IMAP) server name and port
- Outgoing (SMTP) server name and port
- Confirmation that SSL/TLS should be enabled
- Outlook closed before you begin
Outlook on Windows
- Open Outlook and go to File → Add Account. On a first run, Outlook prompts you automatically.
- Enter your email address, then choose Advanced options and tick Let me set up my account manually. This is the important step — skipping it lets Outlook guess, and it usually guesses wrongly.
- Choose IMAP as the account type.
- Enter the incoming server name, port and encryption method exactly as supplied.
- Enter the outgoing server name, port and encryption method.
- Enter your password and click Connect.
- Verify outgoing authentication. Go to File → Account Settings → Account Settings, select the account, choose More Settings, open the Outgoing Server tab and tick My outgoing server (SMTP) requires authentication, using the same settings as incoming.
- Send a test message to yourself and confirm it arrives.
If setup fails at the password step
Outlook sometimes reports a password error when the real problem is the server name or port. Double-check both, confirm encryption is enabled, and try again before assuming the password is wrong.
Outlook on Mac
- Open Outlook and go to Outlook → Settings → Accounts.
- Click the plus icon and choose New Account.
- Enter your email address and continue.
- If Outlook asks for a provider, choose IMAP/POP rather than letting it detect automatically.
- Enter the incoming and outgoing server details with the correct ports and SSL enabled.
- Click Add Account and wait for the mailbox to sync.
- Send a test message to confirm both directions work.
Getting your folders right
With IMAP, Outlook sometimes creates its own local Sent, Drafts and Deleted folders rather than using the server’s. The result is sent mail that appears on your laptop but not your phone.
- Go to Account Settings → More Settings → Sent Items and Deleted Items.
- Set Outlook to save sent items in the server’s Sent folder rather than a local one.
- Do the same for deleted items.
- This keeps every device showing the same thing.
Common Outlook problems
| Problem | Fix |
|---|---|
| Repeated password prompts | Remove the saved credential from Windows Credential Manager, then re-enter it once. |
| Can receive but not send | Enable outgoing server authentication; try port 587 with STARTTLS. |
| Outlook very slow to open | A large mailbox with full sync. Reduce the sync period to 3 or 6 months. |
| Duplicate messages | The account has been added twice, or both IMAP and POP3 are configured. Remove one. |
| Certificate warning | Server name is slightly wrong, or encryption type doesn’t match the port. |
| Search returns nothing | The search index needs rebuilding: File → Options → Search → Indexing Options. |
Before removing an account
If your mailbox is set up as POP3, removing the account from Outlook may delete the only copy of your mail. Back up your data file first, or contact us for help migrating to IMAP safely.