Hi there! I see you're having trouble connecting your email app to the server on your Xiaomi device running Android 10. Let's get this sorted out for you.

First, could you tell me a bit more about the problem? For example:
- Are you unable to send, receive, or both?
- Do you see any error messages? If so, what do they say exactly?
- Which email app are you using?
- Has this issue just started, or has it been ongoing?
- Have you recently changed your email password or any settings?

Knowing this will help me guide you better. Meanwhile, here’s a general step-by-step approach to troubleshoot email server connection issues on Android devices:

1. Check Internet Connection
Ensure your Xiaomi phone is connected to the internet via Wi-Fi or mobile data and that the connection is stable.

2. Verify Email Account Settings
Go to your email app settings and double-check your email address, password, incoming (IMAP/POP) and outgoing (SMTP) server addresses, security types, and port numbers. Sometimes auto-configurations can get disrupted.

3. Update Password
If you recently changed your email password on the provider's website but didn’t update it in the app, it can cause connection failures. Update the password in the app settings.

4. Clear Cache and Data of Email App
On your Xiaomi device, go to Settings > Apps > Your Email App > Storage, then clear cache and, if needed, clear data. This can reset any temporary glitches but you might need to log in again.

5. Remove and Re-add the Email Account
Sometimes the account itself may have sync issues. Remove the email account from the app, restart your phone, then add the account back with correct settings.

6. Check for App Updates
Visit the Google Play Store and see if updates are available for your email app. Updated apps fix many compatibility issues.

7. Restart Your Phone
A simple reboot can resolve temporary connectivity problems.

If you can share any error messages or what you’ve tried so far, I can provide more tailored help. Does that sound good?