How big a video fits in an email (October 2026)
The attachment limit depends on the service you send from, not the one you send to, although a smaller limit at the other end can still bounce the message. The services’ own help pages, checked on October 26, 2026:
- Gmail: 25 MB. A bigger attachment isn’t refused: Gmail uploads it to Google Drive and puts a link in the message instead. Work and school accounts on Google Workspace use whatever limit the administrator chose.
- Yahoo Mail: 25 MB for all attachments together, for mail you send and mail you receive.
- Outlook.com: 25 MB for the entire email, including its text and any inserted pictures, so leave a little room.
- Classic Outlook for Windows: 20 MB by default for IMAP and POP accounts. Microsoft 365 work accounts allow 35 MB per message unless the administrator changed it, and an on-premises Exchange server 10 MB out of the box.
- iCloud Mail: Apple Mail offers Mail Drop for bigger files, up to 5 GB, stored for 30 days.
Shrinking a video to attach it
- Pick the video above. It’s read and compressed on this device; nothing is sent to us.
- Check the target. The page opens at 25 MB. Press one of the buttons under the size chips if you send from Outlook or a work account.
- Trim what nobody needs. An email clip is usually watched once, so cutting the warm-up and the ending buys more sharpness than any setting.
- Compress, then attach the MP4. The tool aims slightly under the target and re-encodes if a result lands over it.
What 25 MB buys
At 25 MB, a one-minute clip gets about 3.2 Mbit/s, enough for sharp 1080p of most scenes. Three minutes leave about 1.1 Mbit/s, where 720p looks better than a soft 1080p, and Resolution on Auto makes that call for you. Past five minutes (about 650 kbit/s), consider splitting the video into parts and sending two emails, or a Drive, OneDrive or Mail Drop link.
Screen recordings of slides or a desktop compress far better than camera footage, so a ten-minute walkthrough can still look clean. For voice notes, extracting just the audio as MP3 takes about a tenth of the space.
Email attachment limits by provider
What each service accepts in one message and what it does with a bigger file, from each provider's help pages (checked October 2026).
| Service | Limit | Bigger files |
|---|---|---|
| Gmail (personal) | 25 MB | Gmail swaps the attachment for a Google Drive link |
| Google Workspace (work, school) | set by the administrator | ask your IT team |
| Outlook.com | 25 MB, whole message | attach it as a OneDrive link (files up to 2 GB) |
| Classic Outlook for Windows, IMAP/POP | 20 MB default | Outlook refuses the attachment |
| Microsoft 365 work account | 35 MB default, whole message | the administrator can set 1 to 150 MB |
| On-premises Exchange server | 10 MB default | the administrator sets the maximum send size |
| Yahoo Mail | 25 MB, all attachments | the limit covers sent and received mail alike |
| iCloud Mail (Mail Drop) | 5 GB | sent as a link that expires after 30 days |