Email Not Syncing? Fix It on Android, iPhone, Outlook & Gmail

Your inbox looks different on your phone than on your computer. New emails appear on one device but not another. Or your sent emails don't show up everywhere. Email sync problems are frustrating — and very common. Here's how to diagnose and fix them.

Why Email Stops Syncing

Email syncing relies on the IMAP protocol, which keeps all your devices in sync with the mail server. Sync breaks when:

• Your device loses its authenticated connection (expired session, password changed)
• IMAP is disabled on your email account
• Your device's sync settings are turned off or set to "manual"
• The email app has a bug or outdated cache
• Your internet connection is unstable
• Your mailbox storage is full (new emails can't be delivered)

Fix on Android: Email Not Syncing

Step 1 — Check your internet connection

Open a browser and load any website. If it loads slowly or not at all, fix your Wi-Fi or mobile data connection first.

Step 2 — Force sync manually

In the Gmail app, pull down on your inbox to force a refresh. For other apps: tap the menu → Refresh or Sync now.

Step 3 — Check sync is enabled

1. Open Settings → Accounts (or Accounts & sync)
2. Tap your email account
3. Make sure Sync Email is toggled on
4. Also ensure Auto-sync data is enabled at the top level

Step 4 — Check sync frequency

In your email app settings, look for Sync frequency or Fetch interval. If it's set to "Manual", you must refresh manually every time. Change it to every 15 or 30 minutes.

Step 5 — Remove and re-add the account

1. Go to Settings → Accounts
2. Tap your email account → Remove account
3. Tap Add account and enter your credentials again

This forces a fresh authentication and often resolves persistent sync issues.

Step 6 — Clear the app cache

1. Go to Settings → Apps → find your email app
2. Tap Storage → Clear Cache
3. Restart the app

Fix on iPhone: Email Not Syncing

Step 1 — Check that Mail fetch is enabled

1. Go to Settings → Mail → Accounts → Fetch New Data
2. Make sure Push is enabled (if your provider supports it) or set Fetch to Every 15 Minutes
3. Scroll down and tap your account — check it's set to Fetch or Push, not Manual

Step 2 — Toggle the account off and on

1. Settings → Mail → Accounts → tap your account
2. Toggle Mail off, wait 10 seconds, toggle back on

Step 3 — Delete and re-add the account

1. Settings → Mail → Accounts → tap your account → Delete Account
2. Tap Add Account and sign in again

Step 4 — Update iOS and the Mail app

Go to Settings → General → Software Update. Outdated iOS versions sometimes have bugs that break Mail sync.

Step 5 — Reset network settings (last resort)

Go to Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings. This clears all saved Wi-Fi passwords so note them down first.

Fix in Outlook (Windows / Mac)

Step 1 — Check your connection

Look at the bottom status bar in Outlook. If it says "Disconnected" or "Trying to connect…", Outlook can't reach the server.

Step 2 — Send/Receive manually

Press F9 or go to Send/Receive → Send/Receive All Folders. If Outlook returns an error message, it will tell you exactly what's wrong (wrong password, server unreachable, etc.).

Step 3 — Check Work Offline mode

Go to Send/Receive tab. If Work Offline is highlighted, click it to go back online.

Step 4 — Check the password hasn't changed

If your email password was recently changed (especially after enabling 2FA), Outlook still has the old one. Go to File → Account Settings → Account Settings → double-click your account → update the password. If your provider requires an App Password (Gmail, Yahoo), generate one and use that.

Step 5 — Repair the Outlook data file

1. Close Outlook
2. Open File Explorer → navigate to C:\Program Files\Microsoft Office\root\OfficeXX\
3. Run SCANPST.EXE (Inbox Repair Tool)
4. Click Browse, find your .pst or .ost file, and click Start

Step 6 — Create a new Outlook profile

1. Go to Control Panel → Mail → Show Profiles → Add
2. Create a new profile and add your email account
3. Set it as the default profile

Fix Gmail Not Syncing on Desktop (Browser)

If Gmail shows old emails or doesn't load new ones in your browser:

1. Hard-refresh: Press Ctrl+Shift+R (Windows) or Cmd+Shift+R (Mac)
2. Clear browser cache: Ctrl+Shift+Delete → clear cached images and cookies → reload Gmail
3. Try a different browser to rule out a browser-specific issue
4. Disable browser extensions — ad blockers and privacy extensions sometimes interfere with Gmail

Check If IMAP Is Enabled on Your Email Account

If email sync works in a browser but not in an app, IMAP may be disabled on your account.

Gmail

1. Go to Gmail Settings → See all settings → Forwarding and POP/IMAP
2. Under IMAP access, select Enable IMAP
3. Click Save Changes

Outlook.com / Hotmail

1. Go to Settings (gear icon) → View all Outlook settings → Mail → Sync email
2. Confirm that POP and IMAP are enabled

When to Contact Your Email Provider

If none of the above works, the problem may be on the server side:

• Check your provider's status page (Google Workspace Status, Microsoft 365 Status)
• Check whether your account has been suspended or your mailbox is full
• Contact support with the exact error message from your email app — this speeds up diagnosis significantly