1. Enable IMAP/SMTP in Gmail Settings
- Log in to Gmail.
- Go to ⚙️ Settings > See all settings > Forwarding and POP/IMAP
- Enable IMAP and/or POP, and make sure SMTP is allowed (default behavior with IMAP).
2. Use App Password (if 2-Step Verification is enabled)
If you use 2-Step Verification in Gmail:
- Go to: https://myaccount.google.com/apppasswords
- Generate an App Password for Outlook.
- Use that password in Outlook instead of your normal Gmail password.
Without this, Gmail will reject access attempts even if the password is correct.
3. SMTP & IMAP Settings for Gmail
Make sure these settings are correct in Outlook:
- SMTP Server:
smtp.gmail.com
- SMTP Port:
465
(SSL) or587
(STARTTLS) - Encryption: SSL/TLS or STARTTLS
- IMAP Server:
imap.gmail.com
- IMAP Port:
993
- Username: your full Gmail email address
- Password: your Gmail App Password
4. Allow Less Secure Apps (Only if no 2FA)
If you’re not using 2FA, enable:
⚠️ Google is phasing this out, so using 2FA + App Password is more reliable.
5. Check Captcha Unlock
Sometimes Google blocks access temporarily.
- Unlock: https://accounts.google.com/DisplayUnlockCaptcha
- Sign in and confirm.
6. Firewall/Antivirus Interference
Check if your firewall or antivirus is:
- Blocking Outlook from accessing Gmail’s SMTP server.
- Temporarily disable them and test.