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Guide

What is the iCloud Mail attachment limit?

20 MB per message, up to 5 GB with Mail Drop. Beyond that, send a link: up to 5 GB here, without an account.

Send bigger

The iCloud Mail limit, plainly

Message with attachments20 MB, sent or received
With Mail Drop turned onUp to 5 GB, all file types
Mail Drop availability30 days to download
Mail Drop storage1 TB, not counted against your iCloud storage

Sources: Apple help — October 2026.

How to send bigger

  1. A TransferThing link

    Drop the file here, even from your iPhone’s browser, then paste the link into your message, in any mail app. Up to 5 GB, without an account for you or the recipient.

  2. Mail Drop

    In Apple Mail or iCloud Mail, Mail Drop sends attachments up to 5 GB as a link available for 30 days. It does not use your iCloud storage.

  3. Compress

    A .zip barely shrinks videos, photos or PDFs, and the message still has to stay under 20 MB.

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Frequently asked questions

What is the maximum attachment size in iCloud Mail?

20 MB per message, sent or received, and up to 5 GB with Mail Drop turned on, according to Apple’s help.

What is Mail Drop?

Apple’s way to send large attachments from Mail: up to 5 GB, all file types, without counting against your iCloud storage. Mail Drop storage is capped at 1 TB.

How long does a Mail Drop attachment last?

Each attachment expires after 30 days, so recipients have 30 days to download it. Apple notes it may not be reachable if the link gets too many downloads or too much traffic.

How do I send more than 5 GB from iCloud Mail?

Mail Drop stops at 5 GB. Drop the file on TransferThing, copy the link and paste it into your message: up to 5 GB, without an account.

Does the recipient need an Apple device?

For a TransferThing link, no: they download in their browser, on any phone or computer.

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  • 5 GBper transfer, free
  • 200files, folders included
  • 3 daysthen everything is erased
  • No accountnothing to create

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