After considering to install SOGo I did read about the features of it and found it useful to have, so I installed the app. As I did discover the app I noticed that the promoted Multiple Mail Accounts (see below) where not configurable. But without this feature SOGo isn’t much useful for me.
https://www.sogo.nu/about.html#/features Multiple Mail Accounts
Configure all your mail accounts (IMAP) from SOGo and forget about login-in to multiple webmail services.
Is there a reason not to have this feature? And is it possible to switch it on in the configuration?
I found the configuration file under /etc/sogo/sogo.conf.
With this you can add multiple mail accounts under settings > e-mail > IMAP-accounts > new mail-account (I have it in German and did freely translate it).
I did test this feature and it seems to behave correct.
Some more information on my SOGo configuration:
When you want to write an e-mail in SOGo, then your account name will be the sender name. To change this, you need to add this configuration:
SOGoMailCustomFromEnabled
This is is the text from the documentation for this config:
Parameter used to allow or not users to specify
custom “From” addresses from SOGo’s
preferences panel.
Defaults to NO when unset.
This allows you to have your full name as sender under identity (in German: Identitäten)