Then I reinstalled akonadi-server and kmail -> kmail does not work saying "The Akonadi personnal information management service is not operational" (Akonadi Server Self-Test return this report : see attachment)
Then, I reinstalled akonadi-backend-mysql and "akonadictl restart", relaunched kmail, and yet it works.
The issue may be that the package akonadi-backend-mysql is both in depends and in suggests of akonadi-server.
About akonadi- backend- postgresql and -sqlite, I can't remember if they were installed when this problem ocurred. So I reproduced it :
apt-get remove kmail akonadi-server akonadi- backend- mysql
Then I reinstalled akonadi-server and kmail -> kmail does not work saying "The Akonadi personnal information management service is not operational" (Akonadi Server Self-Test return this report : see attachment)
Then, I reinstalled akonadi- backend- mysql and "akonadictl restart", relaunched kmail, and yet it works.
The issue may be that the package akonadi- backend- mysql is both in depends and in suggests of akonadi-server.