"No Connection Available" Error on iPhone — Fix

Problem

Airmail on iPhone shows "No connection available" for all mailboxes, even though your phone is connected to the internet.

Solution

Step 1: Check iOS Cellular/Wi-Fi Settings

1. Go to Settings → Cellular (or Mobile Data)
2. Scroll down to find Airmail
3. Make sure the toggle is ON (green)
4. Also check Settings → Wi-Fi and ensure you're connected

Step 2: Check Background App Refresh

1. Go to Settings → General → Background App Refresh
2. Make sure it's enabled for Airmail

Step 3: Reset Network Settings

If the above doesn't work:

1. Go to Settings → General → Transfer or Reset iPhone → Reset
2. Tap Reset Network Settings
3. This will reset Wi-Fi passwords but often fixes connectivity issues

Step 4: Reinstall Airmail

1. Delete the Airmail app
2. Reinstall from the App Store
3. Re-add your email accounts

Note: This error can also appear temporarily during iOS updates or when switching between Wi-Fi and cellular data.