How to Send a Folder via Email

You have a folder of files — project deliverables, photos, documents — and you need to email all of it. The problem: email doesn't support folders as attachments. You zip the folder, but the resulting archive is 85MB. Gmail rejects it. Outlook bounces it. The ZIP barely shrank anything because most of the content was already compressed.

SendSplit accepts your ZIP, splits it into numbered ZIP parts, and delivers each as a standard email attachment — up to 200MB, no accounts required. The recipient downloads all parts, extracts once, and gets your complete folder contents — every file, original quality.

Why You Can't Attach a Folder Directly

Email protocols only support individual files as attachments — not directories. To email a folder, you first have to compress it into an archive. This is straightforward, but creates two new problems:

  • Compression rarely helps much — if your folder contains JPEG images, MP4 videos, PDFs, or Office files, the ZIP will be nearly the same size as the originals; these formats are already compressed at the file level
  • The resulting ZIP exceeds email limits — Gmail caps attachments at 25MB, Outlook at 20MB; a folder of meaningful size almost always exceeds this

Compressing harder (using 7-Zip's maximum compression, for example) won't close the gap — the bottleneck is the attachment size limit, not the archive format.

How to Send a Folder via Email with SendSplit

The process has two stages: zip your folder on your computer, then use SendSplit to split and deliver the ZIP via email.

Step 1 — Zip your folder:

  • Windows: right-click the folder → Send to → Compressed (zipped) folder
  • macOS: right-click the folder → Compress "[folder name]"
  • Linux: zip -r foldername.zip foldername/

Name the ZIP clearly — something like ProjectName_Deliverables_2025.zip. The recipient will see this filename in every email they receive.

Step 2 — Upload and send with SendSplit:

  1. Go to sendsplit.com/upload-to-send and upload your ZIP (up to 200MB)
  2. Choose a split size: 10MB for corporate recipients, 20MB or 25MB for personal inboxes
  3. Enter the recipient's email address and click send

Recipient side:

  1. Receives a series of emails, each with a numbered ZIP part (e.g., ProjectFiles.zip.001, ProjectFiles.zip.002)
  2. Downloads all parts into the same folder
  3. Opens the first part (.001) with any archive tool — 7-Zip, WinRAR, macOS Archive Utility, or Windows Explorer — which automatically reassembles and extracts all parts
  4. Gets the complete original folder contents — every file, original quality, nothing missing

Because the split parts are always ZIP format, the recipient needs no special software beyond what's already on their computer.

Email Filters and ZIP Attachments

Some email security gateways flag ZIP files because malware is sometimes distributed in archives. If your recipient reports that parts were quarantined or blocked:

  • Ask them to check their spam or quarantine folder
  • Enable password protection when sending — encrypted ZIPs cannot be scanned by content filters, which paradoxically makes them more likely to pass through some gateway configurations
  • Contact the recipient's IT department and ask them to whitelist your sending address

Tips for Emailing Folders

  • Name the ZIP after the folder's purpose — ClientBrief_March2025.zip is far clearer than archive.zip; the recipient sees this name on every split part
  • Use 10MB splits for corporate recipients — enterprise mail servers typically cap incoming messages at 10MB; 10MB is the safest universal setting
  • Flatten deeply nested folders before zipping — if your folder has many sub-levels, consider reorganizing into a single level so the recipient can find files immediately after extraction
  • Test with a small file first — if you're unsure whether the recipient's server will accept split ZIP parts, send a small test first to confirm delivery
  • Add password protection for sensitive folders — enable SendSplit's optional encryption for folders containing contracts, personal data, or proprietary work

Stop trying to workaround the folder-to-email problem with cloud links. Try SendSplit — zip your folder, upload, and deliver it as standard email attachments to any inbox, up to 200MB, no accounts required.