This guide explains how to set up a sending and reply address different from the email address used on the Infomaniak platform.

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Preamble

• This is useful for working with one of your email aliases or synonymous domains.
• This will work with the Infomaniak Mail Web app (online service ksuite.infomaniak.com/mail) as well as with most email software/clients.
  • However, be aware: there is no link between the settings entered in the Signature section of Infomaniak Mail and email software/clients.
  • Each email software/client has its own settings, and you can, for example, define a different reply address within each of the respective tools (read at the bottom of this guide).

Set up the sending address on the Infomaniak Web Mail app

Prerequisites

• The secondary email address that can be used must have been added as:
  • … either an email alias (example: aa@ instead of anna.alpha@) but special aliases excluded:
    
  • … or synonymous domains (example: @short-dom.xyz instead of @my-super-long-domain.xyz).

To access the sending address options:

1. Click here to access the Infomaniak Mail Web app (online service ksuite.infomaniak.com/mail).
2. Click on the Settings icon at the top right of the interface.
3. Check or select the email address concerned in the dropdown menu of the left sidebar.
4. Click on Signatures:
   
5. Click on the action menu ⋮ to the right of the current signature.
6. Click on the pencil icon ✎ to edit the current signature.
7. OR ELSE create a new signature:
   
8. Click on the chevron to expand the Advanced Settings section at the bottom of the page.
9. The sending address allows, if proposed, to define the address that will be mentioned as the sender in the inbox of your recipients.
10. The reply address allows you to receive future replies to your emails (return-path) to a different address (among the choices specified in the prerequisites above)…
    • …and if you write a message in response to a reply received on this alias, the signature allowing sending with this alternative identity will be applied instead of the default signature.
11. Confirm with the Save button (if this button remains grayed out, make sure all fields are filled in, especially the full name field):
    
12. Write a new message by selecting the corresponding signature:
    

In the example above, the sending address was changed, but not the reply address. This results in the expected outcome for the recipient (it is sufficient to check the headers of the received message to prove it).

Now add the same secondary address in an email software/client, the effect will be the same.

Configure the sending address on an email software/client

Prerequisites

• The secondary email address that can be used must have been added as:
  • …or email alias (example: aa@ instead of anna.alpha@) including special aliases.
  • … or synonymous domains (example: @short-dom.xyz instead of @my-super-long-domain.xyz).

It is possible to configure an email software/client with any existing email address, even if it exists as an alias in your Mail Service. The sending will be the same as with an address defined as the "main" email.

Example in the Thunderbird software:

1. Add an account with the correct email parameters related to the alias:
   
2. Write a new message from the email software/client.
3. Once received, the message is correctly described, even in its headers, as being sent from an address that you know is an alias: