Mail Drop lets you send large files through Apple Mail without hitting email size limits

Mail Drop is a feature built into Apple Mail that stores large attachments on iCloud servers instead of sending them directly. When you attach a file larger than about 20 MB to an email in Apple Mail, the app offers to use Mail Drop automatically. The recipient gets a download link instead of the file itself, and the link stays active for 30 days. You need an iCloud account and macOS 10.10 or later (or iOS 8 or later) to use it.

Mail Drop works across all your Apple devices — Mac, iPhone, and iPad — as long as you are signed into the same iCloud account. The feature is free and requires no setup beyond having an active iCloud account.

Key Takeaways

  • Mail Drop activates automatically when you try to attach a file larger than about 20 MB in Apple Mail.
  • The recipient receives a download link valid for 30 days rather than the file itself in their inbox.
  • You need an iCloud account and a compatible Apple device running current or recent software to send Mail Drop attachments.
  • Mail Drop files are encrypted in transit and stored on iCloud servers, so the recipient must download within 30 days or the link expires.

When Mail Drop appears and how to use it

When you attach a file larger than roughly 20 MB to an email in Apple Mail, a dialog box appears asking whether you want to use Mail Drop. Click Use Mail Drop and the app uploads the file to iCloud. The recipient sees a message saying the attachment is available for download, with a blue button or link they can click to get the file.

You do not need to do anything else — Mail Drop handles the upload and link generation. If you choose not to use Mail Drop, Apple Mail will still try to send the attachment directly, though many email providers will reject messages larger than 25 MB.

On iPhone and iPad, the process is the same: attach the file, and if it is large enough, Mail will prompt you to use Mail Drop. Tap Use Mail Drop and send the email as normal.

What the recipient sees and how they download

The recipient does not need an iCloud account or any special software. They receive an email with a message explaining that the attachment is available for download. The email includes a button or link they click to download the file to their device.

The download link is active for 30 days from the date you send the email. After 30 days, the link expires and the file is deleted from iCloud servers. The recipient can download the file as many times as they want during that window, but once the 30 days pass, the link no longer works.

Storage and iCloud account requirements

Mail Drop files are stored on your iCloud account, not on the recipient's device or email server. The files count against your iCloud storage limit while they are being held. Once the 30-day window closes, the files are automatically deleted and the storage is freed up.

If you are running low on iCloud storage, Mail Drop may not work until you free up space. You can check your iCloud storage in Settings on iPhone and iPad, or in System Settings on Mac under your Apple ID. If you need more space, you can purchase additional iCloud storage in monthly tiers.

Mail Drop on different devices and operating systems

Mail Drop works on Mac, iPhone, and iPad as long as you are signed into iCloud. On Mac, you need macOS 10.10 or later. On iPhone and iPad, you need iOS 8 or later. If you use an older device that does not support Mail Drop, you can still send large files by using a cloud storage service like iCloud Drive, Google Drive, or Dropbox and sharing a link instead.

Mail Drop does not work in web-based Apple Mail (mail.icloud.com). If you access your email through a web browser, you will need to use a different method to send large files, such as uploading to a cloud storage service and sharing the link in the email body.

Troubleshooting Mail Drop problems

If Mail Drop does not appear when you attach a large file, check that you are signed into iCloud on your device. Go to Settings (iPhone/iPad) or System Settings (Mac) and look for your Apple ID. Make sure iCloud is turned on and you have available storage space.

If the recipient cannot download the file, ask them to check that they are using a supported browser and that they clicked the correct link. The link should open in a browser window where they can download the file. If the 30-day window has passed, the link will no longer work and you will need to send the file again.

If Mail Drop uploads seem slow, check your internet connection. Large files can take several minutes to upload depending on your connection speed. Make sure you stay connected to the internet until the upload completes before closing Mail or putting your device to sleep.

Alternatives to Mail Drop for sending large files

If Mail Drop does not work for your situation, several other options exist. iCloud Drive lets you share a folder or file directly from your Mac or iOS device — the recipient can view or download the file without needing an iCloud account. Google Drive and Dropbox work similarly and are available on all platforms.

You can also use AirDrop if the recipient is nearby with an Apple device on the same network. For very large files or ongoing collaboration, cloud storage services often work better than email attachments because they let multiple people access and edit the same files.

Frequently Asked Questions

Can I use Mail Drop if I do not have an iCloud email address?

Yes. Mail Drop works with any email account in Apple Mail as long as you are signed into iCloud on your device. Your iCloud account handles the file storage and link generation, but you can send the email from any address you have set up in Mail.

What happens if the recipient does not download the file within 30 days?

The link expires and the file is deleted from iCloud servers. The recipient will see an error message if they try to click the link after 30 days. You will need to send the file again if they still need it.

Does Mail Drop work with encrypted emails?

Mail Drop works with standard emails, but not with emails encrypted using S/MIME or other encryption methods. If you need to send a large encrypted file, use a cloud storage service instead and share the link in an encrypted email.

Can I see if the recipient downloaded the file?

No. Apple Mail does not send download notifications or tracking information for Mail Drop attachments. You will not know whether the recipient downloaded the file or when they downloaded it.

Is there a file size limit for Mail Drop?

Mail Drop can handle files up to 5 GB in size. If you need to send something larger, you will need to use a cloud storage service or split the file into smaller pieces.