Customizing Mailboxtext

[HaukeW]

Hello,

when I click on "Mail" in the user interface I see the different mail accounts.
On the right site of each mail Account there is a Helpbutton how to configure some Mailclient. (Outlook, thunderbird...)
Is it possbile to change the Mailserveradresse global?

We want to use own ssl certificate and so all users should connect to the same Maiserveraddress to get no ssl warning.

Best Regards,