Take a 20 MB drawing. How many people receive it? Which devices download it? Which copies go into a backup? The storage meter in one person’s mailbox can’t answer those questions.
Start with a distinction: reducing the volume of files and reducing an environmental footprint are different outcomes. The first can be measured in the application. The second requires information about the equipment, energy, operating lifetime and service arrangements involved.
Understand what a figure measures
There is no universal value that assigns the same carbon footprint to every email. A note from EcoInfo, the CNRS research network, explains why estimates depend on assumptions and system boundaries. It also puts email deletion into perspective within broader environmental action. EcoInfo, the impact of email.
Before repeating a figure, ask what it includes: computer manufacturing, screen use, transmission, servers, copies and backups. Check the year, geographic area and calculation method too. An average calculated for one system does not automatically become a saving achieved when another system deletes a message.
Research presented by the French environmental agency ADEME in January 2025 estimated that digital technology represented 4.4% of France's carbon footprint in 2022. Its scope includes data centres abroad serving French digital use. This finding covers digital technology as a whole, rather than email alone. ADEME, assessment of 2022.
Start with the equipment you keep
A practical first step for a small business is to review its existing equipment before planning replacements. Which computers still meet people's needs? Which can be repaired or upgraded? Which applications continue to work well on that hardware, with the necessary security updates?
The French regulator Arcep identifies extending equipment's useful life as one of the ways to reduce the environmental footprint of digital technology. Arcep, the environmental footprint of digital technology.
When changing email systems, include current workstations in the pilot. Test attachments, search and everyday tasks on a computer that represents the existing fleet. A demonstration on a brand-new machine tells you little about the business's actual need to replace equipment.
Reduce exchanges that add no value
ADEME's guidance includes avoiding unnecessary recipients, reducing attachment sizes and using appropriate file-sharing spaces. ADEME, digital technology at work.
Turn those principles into straightforward routines. For a large project file, establish one reference version accessible to the people involved. Check permissions and access duration before sending its link. For a document requiring approval, identify the exact version to review. For a mailing list, make someone responsible for checking regularly that it still serves a purpose.
These choices can also reduce duplicate files and frustrating searches. Keep documents needed for operations, retention obligations and active cases, however. An archiving policy should be developed with the team; bulk deletion based only on the age of emails can remove information people still need.
Ask suppliers for evidence
A service described as more resource-efficient should make its comparison understandable. Which activities and volumes were studied? Over what period? Were additional equipment, backups and AI processing included? Is the quality of service comparable?
Local storage deserves the same questions as remote storage. Its footprint depends on the hardware involved, how fully it is used and how it operates. Moving data from one place to another does not, by itself, demonstrate a measured reduction in environmental impact.
France's General Framework for the Ecodesign of Digital Services, the RGESN, provides a way to examine how a service is designed. Arcep clarifies that its implementation indicator is not an environmental impact calculation. A documented design process and a quantified result remain different pieces of information. Arcep, RGESN.
Track a few decisions over time
Begin with a simple record: equipment age, devices repaired, retained data volumes, archiving rules and AI uses that serve an identified need. Assign an owner to each action and schedule a review with the team.
These indicators help manage practices; they do not yet amount to a carbon assessment. If the business wants to publish an emissions reduction, it will need a baseline, a method and comparable boundaries. That discipline makes progress easier to understand and commitments more credible.