It can be a major disruption to your daily life when you try to send a LINE message and see “Failed to send” or find the “Sending” icon (the spinning circle) stuck indefinitely. The causes range from simple connection instability to issues with the recipient’s account status or corrupted in-app data.
In this article, we pinpoint the exact reasons why your LINE messages are not going through and provide a step-by-step recovery guide focusing on three perspectives: Connection, App, and Account. Let’s resolve these issues and ensure your messages reach their destination.
Main Causes Why LINE Messages Are Not Sending
1. Connection Issues (The Most Common Cause)
- Unstable Internet Connection: Weak Wi-Fi or mobile data causes the message to hang mid-transmission (indicated by the spinning icon).
- Data Throttling: If your mobile data speed is capped, even simple text messages may fail to send or take a significant amount of time.
- LINE System Outage: A platform-wide failure where LINE’s servers are down, affecting many users simultaneously.
2. App and Device Issues
- Corrupted App Cache: Accumulated or corrupted data (cache) within the app can interfere with the messaging function.
- Outdated App Version: Using an old version may lead to compatibility errors with the latest OS or server systems.
- Temporary Device Glitch: A smartphone freeze can cause app processes to become unstable.
3. Account and Privacy Settings
- Being Blocked: If someone has blocked you, your messages will show as “sent” on your end, but they will never reach the recipient or show a “Read” status.
- Deleted Account: The recipient’s account no longer exists due to deactivation or suspension.
- Temporary Action Restrictions: Sending a massive number of messages in a short time can be flagged as spam, resulting in a temporary block of your messaging features.
Emergency Response: Steps to Fix Messaging Errors
Step 1: Basic Refresh of Connection and App
| Action | Purpose & Operation |
| Force Close & Restart | Completely close the app and restart your device. |
| Switch Networks | Toggle between Wi-Fi and mobile data to see which is more stable. |
| Update the App | Check the App Store or Google Play Store for the latest LINE update. |
Step 2: Maintain App Data and Chat Settings
- Clear Cache (Recommended): Go to LINE Home → Settings (gear icon) → Chats → Delete data → Select and delete “Cache” only.
- Test Other Chats: Try sending a message to a different friend. This helps identify if the problem is specific to one person or the entire app.
- Wait It Out: If the cause is a system outage or a temporary restriction, wait for a few minutes to several hours before trying again.
Step 3: Verify Account Status
- Check for Blocks: If you suspect a block, try checking the user’s profile or asking a mutual friend if the account is still active.
- Resolve Account Limits: If you were flagged for rapid activity, avoid sending messages for several hours up to 24 hours. The restriction usually lifts automatically.
💡 Preventive Measures: Habits for Smooth Messaging
- Ensure Stable Connectivity: Always try to send large files (images/videos) while connected to reliable Wi-Fi.
- Clear Cache Regularly: Set a habit to clear your cache once a month to prevent the app from becoming sluggish.
- Avoid “Spam-like” Behavior: Refrain from sending too many messages in quick succession to avoid triggering safety filters.
By following these steps, you can quickly resolve LINE messaging issues and lower the risk of future errors.
