I want to know if it is possible for my multiple clients to send work request directly to Asana via emails?
Welcome to the Asana Community Forum @Mea_Inglehart! For your clients to be able to send you requests to Asana via email, they’d need to be members of your Workspace/Organziation in Asana.
Alternatively, if you don’t want to create accounts for them. I recommend you using our Forms feature. You can create a form that they can submit every time they need to send you work requests.
I hope this helps!
The Forms feature is a good idea. You could also setup a zap that would read your emails, look for a specific trigger, and create a task as a result.