What this means
- Most photos recover fine. A small number of files in any large archive are corrupt on the server side (truncated emails, damaged encodings from years ago).
- Snapattic verifies every file by its actual content, not just its name, so a mismatched or broken file is skipped rather than saved as a broken photo.
What to do
- Usually nothing — these files are genuinely unrecoverable.
- If a specific photo matters, try forwarding that original email to yourself and recover again; re-delivery sometimes repairs a broken attachment.
Transient failures
If a download dropped due to a brief connection hiccup, Snapattic retries it automatically. If an attachment still fails after those retries, it is a network/resume problem rather than a corrupt attachment: the affected message remains eligible for a later run and recovery does not advance past it. Reconnect and resume instead of assuming the photo was skipped.