from email receiving in the inbox I want to create a task. That will work. If I double click on the task, the email is opend. But after I file the email, the link to the mail is gone.
The idea is that I can keep my imbox empty and know what to do. How canm I solve this.
To open a linked email, you can only click on it once.
Regarding the issue with moving emails - please tell me, are you using an Exchange server? If so, please try to move or archive the message first and then add it as a task and see if this fixes this issue. We'll try to address this problem in future updates.
Alternatively, instead of linking a message to a task, you can forward it to a project. This will even create a task note from the entire content of the message. Please refer to this post on our blog for more information: http://todoist.com/blog/2013/01/zero-inbox-policy-with-todoist/