Odoo 9.0

I have set up my catch all mail server and when I write a message to a contact in odoo they receive the email with sender as my user's email and reply-to as catchall. 

On the other hand: when sending a message via sales leads (and I've set up an alias pointing to the sales module) the email is received with sender and reply-to as my user's email. This means that when the person replies odoo doesn't catch it. How do I set things up similarly to the contacts module so that the reply-to is the correct alias.