Typical email attachment limits
Last checked against the linked provider documentation: 9 October 2026.
Limits depend on account, application and recipient. They can apply to combined attachments or the entire message; the table does not guarantee your message will be accepted.
| Service | Limit | Scope and source |
|---|---|---|
| Gmail (privates Konto / personal account) | 25 MB | Gesamte Anhänge / combined attachments · Provider source |
| Outlook 2013+ (Internet-Konto / internet account) | 20 MB (20.480 KB) | Standard im Desktop-Client, konfigurierbar; nicht Exchange / desktop default, configurable; not Exchange · Provider source |
How much margin should I leave?
Leave margin below the documented limit. Email transfer encoding and additional attachments can reduce your budget. Check the current error message and recipient provider documentation.
- Check the limit for your specific account.
- Add up all attachments.
- Reduce a new copy and inspect readability.
- Ask the recipient for another transfer method if the limit cannot be reached.