Proton Mail upload limits
What Proton Mail accepts, according to its official documentation.
| What | Limit | Plan | Source |
|---|---|---|---|
| Outgoing attachments (total) Outgoing email, total of attachments, up to 100 files. Incoming limit is 50 MB. Proton notes that encoding makes attached files a bit larger than on your device. | 25 MB | — | Official source |