The plugin is working for me on many different websites and several different servers. I get dozens of emails throughout each day from several sites where I use Contact Form 7.
??Any issue you have is almost certainly due to something on your local WP install.
If you are unable to solve your particular problem after working through each of the issues covered at Contact Form 7 Email Issues, you should in your own post (see Forum Welcome) describe your problem in detail – see https://codex.www.ads-software.com/Forum_Welcome for some guidance.
If possible include a link to your CF7 form and all your input in both the Form section and Mail section of the CF7 interface.