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How to reduce heavy email weight

Attachments, images, signatures... Discover the real environmental impact of your emails and modern solutions for more sober digital practices.

50g
CO₂ per 25MB email
90%
possible reduction
×4
storage multiplication

Context

Reducing email weight is an often overlooked environmental necessity. Each large email generates a significant carbon footprint during transit and storage. Attachments, unoptimized images, and multiple copies multiply the impact. We propose a responsible approach: optimize before sending, compress intelligently, and use dedicated transfer solutions for heavy files. FileVert integrates this philosophy by minimizing unnecessary steps and optimizing every transferred byte.

Learn more:

Reduce the carbon footprint of large emails: B2B challenges

Email weight factors

Understanding the components that weigh down your emails and their modern solutions

Attachments

5-25 MB90% of total weight

Classic optimizations:

  • ZIP compression
  • Cloud links
  • Transfer services

✓ Solution moderne :

FileVert: light links, 200GB files

Embedded images

100KB-2MB5-8% of weight

Classic optimizations:

  • JPEG compression
  • Resolution reduction
  • Optimized formats

✓ Solution moderne :

Light images + FileVert links if large

HTML signatures

50-500KB2-3% of weight

Classic optimizations:

  • Hosted images
  • Optimized code
  • Compressed logos

✓ Solution moderne :

Minimalist signature + portfolio link

HTML formatting

10-100KB1-2% of weight

Classic optimizations:

  • Minimal inline CSS
  • Avoid custom fonts
  • Simple HTML

✓ Solution moderne :

Plain text + rich content link

Impact by email provider

Comparative analysis of carbon footprint according to your email client

Gmail

15 GB shared

Storage per user

Carbon impact:High
×3 (multiple copies)

Real weight multiplier

Problems:

  • Advertising scanning
  • Permanent storage
  • Content indexing

Hidden costs:

MetadataSearch indexAutomatic backup

Outlook/Exchange

50-100 GB

Storage per user

Carbon impact:Very High
×4 (multi-device sync)

Real weight multiplier

Problems:

  • Forced synchronization
  • Local copies
  • Automatic archives

Hidden costs:

Local PSTOutlook cacheMobile sync

Apple Mail

5 GB free

Storage per user

Carbon impact:Medium
×2.5 (ecosystem)

Real weight multiplier

Problems:

  • iCloud sync
  • iOS/Mac copies
  • Embedded photos

Hidden costs:

Mail cacheSpotlight indexingiCloud sync

The FileVert solution

Transform your heavy emails into light and efficient communications

Ultra-light emails

Replace your attachments with 2KB links

99% reduction

Instant sending

No more timeout, emails sent in seconds

10× faster

Reduced carbon footprint

Drastically reduce environmental impact

80% less CO2

Universal compatibility

Works with all existing email clients

100% compatible

Practical optimization steps

Step-by-step guide to immediately lighten your emails

1

Identify large attachments

Find files > 1MB in your emails

Use the size search function2 minutes
2

Replace with links

Upload to FileVert and copy the link

Drag and drop your files on filevert.fr30 seconds
3

Write the optimized email

Insert the light link instead of the attachment

Paste the link in your message10 seconds
4

Measure the impact

Observe the difference in sending speed

Compare with a classic emailInstant

Lighten your emails now

Start reducing the impact of your communications while improving their performance.

Optimize my emailsOther eco-friendly guides
✓ Emails 10× faster · ✓ Reduced carbon impact · ✓ Compatible everywhere

Frequently asked questions

Everything you need to know about email weight optimization

A 25MB email emits 50g of CO₂ and is multiplied by 3-4 depending on provider (Gmail ×3, Outlook ×4). With 10 recipients, this represents 1.8 kg CO₂/year or 8 km by car. FileVert reduces this to 18g CO₂/year (75m by car).
Maximum 1MB for optimal email. Beyond that, use FileVert: email stays <15KB with secure link to files up to 200GB. 99% weight reduction with same user experience.
ZIP compression reduces 20-60% depending on file type (documents 60%, images 20%, videos 5%). But FileVert is more effective: 99% reduction with simple link, more secure and professional.
Gmail multiplies by 3 (advertising scanning, multiple copies), Outlook by 4 (forced sync, local PST), Apple Mail by 2.5 (iCloud ecosystem). FileVert avoids this multiplication with optimized temporary storage.
Signature <5KB: plain text, minimal hosted logo, avoid complex HTML. Better: minimalist signature + link to portfolio/site. FileVert can host your professional portfolio with lightweight link in signature.
Yes: FileVert email = 0.5g CO₂ vs 50g for standard email. Temporary storage (2-15 days) vs permanent, Scaleway 100% renewable hosting, and avoids multiplication by email providers.
Absolutely! FileVert accepts up to 200GB total per transfer. Single link in your email provides access to all files. Recipient downloads what they want, further reducing environmental impact.
Yes, universal compatibility: Gmail, Outlook, Apple Mail, Thunderbird, webmails... FileVert link displays as classic URL and opens in browser. No installation required on recipient side.