Is there any component like "uddeim" that allows users send pms each other for k2 users.

Thanks.

Hi. It depends on what you want to do. K2 users are regular Joomla! users, so any component like that will work. Now if you want to integrate it to K2 pages then you should ask it's developer to see if it has any plugins that do that.

I want to make users can send pms each other. I am using k2, community builder and Uddeim. I want to have a button on the items to send pms to the author of item.

I think it is better to ask the developers of community builder and Uddeim regarding if they support PMs and if there is a way to add a button in K2 pages.