Yahoo Mail caps individual attachments at 25MB. Use this guide to keep videos under the limit, understand when Yahoo switches to Dropbox, and point senders to the right compression preset.
Yahoo Mail attachment limit: 25MB per message once MIME overhead is applied. Bigger files trigger a Dropbox share prompt.
Need to send a clip right now? Open the Yahoo Mail attachment limit calculator for bitrate math or jump straight to the 25MB email compressor.
Need Gmail's limits? Read the Gmail video size limit guide or use the Gmail attachment calculator.
| Provider | Safe attachment size | Best tool to use |
|---|---|---|
| Yahoo Mail | 22-25MB | Yahoo Mail attachment limit calculator |
| Gmail | 20-25MB | Gmail video size limit calculator |
| Outlook.com | 20-25MB | Email compressor (25MB preset) |
For a full comparison across providers, see the email attachment limits guide.
Want math first? The Yahoo Mail calculator converts duration into a safe bitrate so you know what to expect.
If you have to send a longer video in full resolution, let Yahoo Mail upload it to Dropbox. Yahoo will insert a secure share link for clips up to several gigabytes. Recipients don't need a Dropbox account to download.
If you collaborate across teams, consider hosting on Drive as well-Gmail automatically converts large files to Drive links.
No, the 25MB cap applies to the encoded attachment payload. The message body can be long, but inline images contribute to the total if they are large.
1080p needs more bitrate than 25MB allows for multi-minute clips. Downscale to 720p or 480p inside the tool, or let Yahoo share the full-resolution file via Dropbox.
You can attach several files as long as the combined encoded size stays under 25MB. For multiple clips, send separate messages or bundle them in a ZIP and use Dropbox.