Start with your target size based on the recipient mail service attachment limit.
2
Orden de compresion
Compress in steps: begin at medium level, check readability, then reduce further only if needed.
3
Por tipo de documento
Text-heavy PDFs are usually optimized with minimal visible loss, while image-heavy PDFs need resolution tuning.
4
Nombres y version
Use consistent naming and versioning in both filename and email body.
5
Revision movil
Always test openability on mobile before sending to clients.
6
Estandar del equipo
If this is recurring work, standardize one default compression level across your team.