Gmail caps attachments at 25 MB, Outlook commonly at 20, and plenty of corporate gateways at 10. Here's the fastest path under each bar.
Run Balanced compression first. If the file barely shrinks, it's image-heavy — a scan or a photo-rich deck — and needs Strong. If Balanced already lands you under the limit, stop there: it's lossless and keeps text selectable.
Strong re-renders pages as optimized JPEGs at reading resolution. A 40 MB scanned contract routinely lands at 4–8 MB. Maximum pushes further for archives, at visibly softer quality — fine for reference copies, not for print.
A 200-page report that must stay pristine? Split it into parts ("1-100" and "101-200") and send two emails — Kameleo's Split does it in two clicks, and each part stays full quality.
Every step above runs in your browser. The confidential deck you're emailing was never itself emailed to a compression server — which is exactly how it should work.