If you are not able to send emails with large attachments, here are a few things you can try:

1. Check your mail server’s settings to make sure it allows for large attachments.
2. Use a cloud-based file sharing service such as Dropbox or Google Drive.
3. Compress the file into a ZIP folder before sending it.
4. Break down large files into several smaller files.
5. Upgrade your email plan to one that supports larger attachments.