Make sure your internet connection is working and fast enough to support large file sizes.

Check your email account’s inbox storage and see if it has exceeded its limit.

Confirm if the email’s recipient’s account supports large attachments.

1. Check if the email was already sent.
2. Check the email address for any spelling/typing error.
3. Try sending the email again using a different internet connection.
4. Compress the attachment to reduce its file size.