Issue Description
Emails remain stuck in Outbox or fail to send.
Common Causes
Incorrect mail server settings
Network issues
Mail app sync errors
Step-by-Step Solution
Step 1: Check Internet Connection
Ensure stable Wi-Fi or cellular data
Step 2: Verify Mail Account Settings
Settings → Mail → Accounts → Account
Confirm server credentials
Step 3: Restart iPhone
Refreshes Mail services
Step 4: Remove and Re-add Email Account
Fixes corrupted mail sync data
Explore Further
Test sending email via webmail
Prevention & Best Practices
Avoid switching networks during send.