Compress PDF for email attachments when the server rejects your file
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Practical steps when Outlook or Gmail blocks a large PDF — expectations, merge-first workflows, and QA.
Mail servers and web forms publish size ceilings (often 10–25 MB). Scanned bundles and photo-heavy exports exceed that quickly. Compression rewrites the container; it does not replace choosing the right source export.
Merge before compress when possible
If you still have separate chapters, merge into one QA pass, then compress once.
Set expectations
Heavy scan compression may soften fine text — zoom to 100% before sending contracts.
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