Send messages from another email address

This guide explains how to set up a different sending and reply address from the email address used. This is useful for working with one of your email aliases or synonym domains.

This will work with Mail Infomaniak, but also with most email software/clients.

Prerequisites

• the secondary email address to be used must have been added as:
  • either an email alias (e.g., aa@… instead of anna.alpha@…) (special aliases excluded)
  • or synonym domains (e.g., …@short-dom.xyz instead of …@this-is-my-super-long-domain.xyz)

Set Up the Sending Address in Mail Infomaniak

To access the options for sending addresses:

1. log in to Mail Infomaniak (mail.infomaniak.com) from a web browser like Brave or Edge
2. click on the ‍ icon at the top right of the interface
3. check or select the relevant email address from the dropdown menu
4. click on ‍ Signature
5. click on the action menu ⋮ to the right of the current signature
6. click on the ‍ icon to edit the current signature
7. OR ELSE create a new signature
   
8. click on Show advanced settings ‍‍
   ‍
9. the address
   1. sending lets you set the address that will be mentioned as the sender in your recipients' inboxes
   2. reply allows receiving future replies to your messages (return-path) to a different address (from the choices specified in the prerequisites above)
      1. and if you write a message following a reply received on this alias, the signature allowing sending with this alternative identity will be applied instead of the default signature
10. confirm with the blue Save button (if it remains grayed out, ensure that all fields are filled, especially the full name field)
    
     
11. compose a new message selecting the corresponding signature
    

In the example above, the sending address has been changed but not the reply address. This results in the expected outcome at the recipient's end (just check the headers of the received message for proof).

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

Set Up the Sending Address in Betterbird

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 done in the same way as with an address defined as the "main" email.

Example in the Betterbird software (a fork of Thunderbird):

1. add an account in Betterbird with the correct email settings related to the alias
   
2. compose a new message
3. once received, the message is well described as being sent from an address you know to be an alias:
   

Note: there is no link between the settings entered in the Signature section of Mail Infomaniak and email software/clients. Each email software/client has its own settings, and you can e.g., set a different reply address in each tool.