Article
CSR issues: How to optimize the impact of email signatures
Article
CSR issues: How to optimize the impact of email signatures
1. Choose and edit your template
Sigilium offers various email signature templates. They are all dynamic (they integrate powerful logic) and customizable. Choose the one that suits you. Preview the rendering. Apply it to the signatures.
Customize the fields:
Define the logo and the colors used
Define the sites and networks associated with each entity
Allow adding portraits
Add direct appointment scheduling
Benefit from our HTML editor
Make the most of your skills and creativity. If you want to modify variables from an existing template or code your own template, it's possible! Sigilium allows you to test and preview your work before applying it to all or part of the users.
Or opt for custom integration
You have built an email signature template internally or with your agency? We can integrate it. Preparing a functional email signature requires validating a certain number of constraints.
Here is an article / a check-list that will help you check that everything is OK for the integration!
1. Choose and edit your template
Sigilium offers various email signature templates. They are all dynamic (they integrate powerful logic) and customizable. Choose the one that suits you. Preview the rendering. Apply it to the signatures.
Customize the fields:
Define the logo and the colors used
Define the sites and networks associated with each entity
Allow adding portraits
Add direct appointment scheduling
Benefit from our HTML editor
Make the most of your skills and creativity. If you want to modify variables from an existing template or code your own template, it's possible! Sigilium allows you to test and preview your work before applying it to all or part of the users.
Or opt for custom integration
You have built an email signature template internally or with your agency? We can integrate it. Preparing a functional email signature requires validating a certain number of constraints.
Here is an article / a check-list that will help you check that everything is OK for the integration!
2. Manage the brand image of various entities
You have multiple brands or entities within your company? From the same account, you can manage the brand image of each one.
Define a common template with variations for each brand, or define a template for each brand.
In a few minutes, configure the elements of each brand/entity: logo, website, social networks, contact information...
2. Manage the brand image of various entities
You have multiple brands or entities within your company? From the same account, you can manage the brand image of each one.
Define a common template with variations for each brand, or define a template for each brand.
In a few minutes, configure the elements of each brand/entity: logo, website, social networks, contact information...
3. Deploy a change of identity
Close to 40% of the companies using Sigilium to centralize the management of their email signatures have evolved their identity over the past four years.
The power of centralized management allows you to make a change and deploy it to all concerned users, in less than 3 minutes.
Customer Cases
Changes in identity, email nomenclature, franchise management, acquisitions/mergers of multiple brands:
Discover some customer cases and how they have managed and deployed these changes, very simply.
Discover customer cases
3. Deploy a change of identity
Close to 40% of the companies using Sigilium to centralize the management of their email signatures have evolved their identity over the past four years.
The power of centralized management allows you to make a change and deploy it to all concerned users, in less than 3 minutes.
Customer Cases
Changes in identity, email nomenclature, franchise management, acquisitions/mergers of multiple brands:
Discover some customer cases and how they have managed and deployed these changes, very simply.
Discover customer cases
1. Choose and edit your template
Sigilium offers various email signature templates. They are all dynamic (they integrate powerful logic) and customizable. Choose the one that suits you. Preview the rendering. Apply it to the signatures.
Customize the fields:
Define the logo and the colors used
Define the sites and networks associated with each entity
Allow adding portraits
Add direct appointment scheduling
Benefit from our HTML editor
Make the most of your skills and creativity. If you want to modify variables from an existing template or code your own template, it's possible! Sigilium allows you to test and preview your work before applying it to all or part of the users.
Or opt for custom integration
You have built an email signature template internally or with your agency? We can integrate it. Preparing a functional email signature requires validating a certain number of constraints.
Here is an article / a check-list that will help you check that everything is OK for the integration!
2. Manage the brand image of various entities
You have multiple brands or entities within your company? From the same account, you can manage the brand image of each one.
Define a common template with variations for each brand, or define a template for each brand.
In a few minutes, configure the elements of each brand/entity: logo, website, social networks, contact information...
3. Deploy a change of identity
Close to 40% of the companies using Sigilium to centralize the management of their email signatures have evolved their identity over the past four years.
The power of centralized management allows you to make a change and deploy it to all concerned users, in less than 3 minutes.
Customer Cases
Changes in identity, email nomenclature, franchise management, acquisitions/mergers of multiple brands:
Discover some customer cases and how they have managed and deployed these changes, very simply.
Discover customer cases
Introduction
Since its creation in 2015, Sigilium allows you to better manage and optimize the weight of email signatures for the entire company. Our service offers you concrete and functional solutions to optimize the weight of the data relayed in email exchanges and thus your CSR impact. The idea is to be as efficient as possible while remaining understated in terms of weight in daily email exchanges.
Introduction
Since its creation in 2015, Sigilium allows you to better manage and optimize the weight of email signatures for the entire company. Our service offers you concrete and functional solutions to optimize the weight of the data relayed in email exchanges and thus your CSR impact. The idea is to be as efficient as possible while remaining understated in terms of weight in daily email exchanges.
Digital impact: Key figures & perspective
To fully understand the role and environmental impact of using HTML email signatures in daily exchanges, it is important to put our digital practices into perspective. Here are some figures from the research conducted by the The Shift Project team, who are very involved in the issue of carbon emissions due to human activity.
The July 2019 report allows us to see that "all digital practices today emit 4% of global greenhouse gases, and their energy consumption is increasing by 9% per year." Therefore, there is a need to work towards sobriety in our digital practices.
Digital impact: Key figures & perspective
To fully understand the role and environmental impact of using HTML email signatures in daily exchanges, it is important to put our digital practices into perspective. Here are some figures from the research conducted by the The Shift Project team, who are very involved in the issue of carbon emissions due to human activity.
The July 2019 report allows us to see that "all digital practices today emit 4% of global greenhouse gases, and their energy consumption is increasing by 9% per year." Therefore, there is a need to work towards sobriety in our digital practices.
Email signatures: a minimal impact
It is also learned that of the 4% emitted by all digital uses combined, 80% are due to the production, distribution, and consumption of video content.
The concrete impact of messaging and email signatures is therefore very low: it is a small part within the 0.8% (20% of the 4%) of digital uses excluding video. However, it should not be overlooked, and Sigilium is working, and you are being helped, to optimize your impact on the specific subject of email signatures.
Email signatures: a minimal impact
It is also learned that of the 4% emitted by all digital uses combined, 80% are due to the production, distribution, and consumption of video content.
The concrete impact of messaging and email signatures is therefore very low: it is a small part within the 0.8% (20% of the 4%) of digital uses excluding video. However, it should not be overlooked, and Sigilium is working, and you are being helped, to optimize your impact on the specific subject of email signatures.
What is the weight of an email signature?
Here is a sample email, with an associated signature, including 3 images: 1 logo, a meeting request button, and a banner relaying content.
The total weight of this email (signature included) varies from 10KB to 124KB depending on the messaging service used.
Average weights observed:
Gmail signature with image banner: 10 KB
Outlook signature with text banner: 40 KB
Outlook signature with image banner: 120 to 200 KB
What is the weight of an email signature?
Here is a sample email, with an associated signature, including 3 images: 1 logo, a meeting request button, and a banner relaying content.
The total weight of this email (signature included) varies from 10KB to 124KB depending on the messaging service used.
Average weights observed:
Gmail signature with image banner: 10 KB
Outlook signature with text banner: 40 KB
Outlook signature with image banner: 120 to 200 KB
Compared weight of contents
Weight of a 4k (HD) video of 3 minutes: 1.1 GB
Weight of a standard video (720p) of 3 minutes: 45 MB
Weight of a maximum compressed video (144p) of 3 minutes: 4.5 MB
Average weight of an email with an HTML signature: 120 KB (10 KB to 200 KB depending on the email service used) Which is on average 375 times less than a standard video. Knowing that the vast majority of videos played on a mobile use the maximum resolutions.
This means that each time you play a video that you've uploaded, on YouTube or on your social networks, it has an impact at least 375 times greater than sending an email with a signature that includes a communication.
Compared weight of contents
Weight of a 4k (HD) video of 3 minutes: 1.1 GB
Weight of a standard video (720p) of 3 minutes: 45 MB
Weight of a maximum compressed video (144p) of 3 minutes: 4.5 MB
Average weight of an email with an HTML signature: 120 KB (10 KB to 200 KB depending on the email service used) Which is on average 375 times less than a standard video. Knowing that the vast majority of videos played on a mobile use the maximum resolutions.
This means that each time you play a video that you've uploaded, on YouTube or on your social networks, it has an impact at least 375 times greater than sending an email with a signature that includes a communication.
Image management according to messaging services
There are 2 approaches in managing email images:
remote images
embedded images (embedded)
With the exception of Outlook (which is actually changing), all email services like Gmail, Mail, Thunderbird... use a remote image system. These are loaded from your email service's server when opening the email.
In contrast, on Outlook, the images in an email are embedded in the message (embedded). They are like attachments to the message.
It is therefore interesting to optimize their size.
Image management according to messaging services
There are 2 approaches in managing email images:
remote images
embedded images (embedded)
With the exception of Outlook (which is actually changing), all email services like Gmail, Mail, Thunderbird... use a remote image system. These are loaded from your email service's server when opening the email.
In contrast, on Outlook, the images in an email are embedded in the message (embedded). They are like attachments to the message.
It is therefore interesting to optimize their size.
Concrete optimization actions with Sigilium:
1.Limits
When creating a banner, an image that is too heavy is refused. The user is alerted and asked to reduce it.
3. Awareness
We educate content teams with accurate articles. And we raise their awareness of the benefits gained through a centralized tool like Sigilium:
control of the images used and their size
optimization of images
2. Optimization
The uploaded images are optimized thanks to a dedicated algorithm.
For example: an image banner that is generated by content creation software has its weight reduced by an average of 15%.
4. Innovation
Sigilium offers a concrete alternative to image banners: text banners. They weigh 3 times less:
120kb with a banner
40kb with text message
You also have levers of action.
As an administrator of an account on Sigilium, you can also act directly:
Choose to limit the number of images in the signature template
To focus attention on one piece of information and optimize the weight of the signatureLimit your use of gifs, or consult our recommendations.
Limit the amount of detail and colors in image banners.
Act on the levels of image compression, at the level of the messaging itself.
Do not copy too many people on messages (cc, bcc)
You also have levers of action.
As an administrator of an account on Sigilium, you can also act directly:
Choose to limit the number of images in the signature template
To focus attention on one piece of information and optimize the weight of the signatureLimit your use of gifs, or consult our recommendations.
Limit the amount of detail and colors in image banners.
Act on the levels of image compression, at the level of the messaging itself.
Do not copy too many people on messages (cc, bcc)
New page for the privacy policy
New page for the privacy policy
Let's discuss your needs
And easily take control of the company's email signatures!
Let's discuss your needs
And how to turn your email signatures into effective media
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Team and Partners
Ressources
© 2025 Sigilium. All rights reserved.