Use a cloud storage service (Google Drive, OneDrive, Dropbox, iCloud Drive) and share a link
Upload the file to the cloud, then set sharing permissions (view or edit)
Copy the share link and paste it into an email
Use email providers’ built-in large attachment options (e.g., “Send via Google Drive” / “Attach from Drive”)
Compress files into a ZIP or RAR archive before attaching
Split the file into smaller parts using a file-splitting tool, then attach each part
Send multiple emails with parts labeled clearly (Part 1, Part 2, etc.)
Use a dedicated file transfer service (WeTransfer, Smash, Dropbox Transfer) and email the download link
Use SFTP or secure file transfer (server-to-server) if your organization supports it
Use an enterprise secure email/file portal if available (e.g., Proofpoint, Mimecast, SecureSend)
Ensure the recipient has access to the link or can download the attachment
If required, password-protect the archive and share the password via a separate channel (e.g., another email or SMS)
Verify the recipient can open the file format before sending (especially for PDFs, Office files, and compressed archives)