Utilities Contact Information
Though the plugin successfully sends millions of emails every day, there are a host of issues that can delay or stop emails on both the sending and receiving ends of a typical email.
The important point to note is that the sending and receiving of emails depends heavily on both the server where your WordPress installation is hosted and the email configuration of the local computer where the emails are supposed to be received.
If you are having email problems, you will need to investigate this issue in detail for your particular local configurations.
Buzztone has written a comprehensive and detailed explanation about Contact Form 7 Email Issues to help people, who are having trouble sending and receiving emails from Contact Form 7, solve their problems.
The article covers the following items that can commonly cause email sending problems with this plugin (and WordPress in general):