In the contexte of multi-sites, SEBLOD add some user groups and some access levels.
Each site has its specific user groups and specific access levels. You can use these access levels to configure "email" field in a content type.
For example if you will define two sites: A and B with access access_A and access_B, you can add two email fields in a content type. Then, you click on button 4 in form views. You select access_A for the first field and access_B for the second.
Yes, I could add an Option custom parameter Email field and, as explained into the tutorial and wrote by Mehdi: "...Each site has its specific user groups and specific access levels. You can use these access levels to configure "email" field in a content type..."
But, it is valid only for the content type I'm creating with Seblod.
What I mean is that the "Global Configuration > Server > Mail Settings > Mailer / From email / From Name" field are missing into the Multi Site creation (the same thing it is happening with Site Name, Meta Description, Meta Keyword, Language, Template Site for example, where they take place in the master site configuration file. In this way all the Joomla System Emails like Registration Email, Remember Password Email etc. will be sent through the Slave Site Domain Email and not through the Master Site Domain Email...