Contact Form 7 5.2 is now available. This is the first major update in 20 months and includes a lot of improvements and bug fixes. I recommend that you upgrade immediately.
Notice that Contact Form 7 5.2 requires WordPress 5.3 or greater to work. Since WordPress 5.3 requires PHP 5.6.20+ (WordPress recommends PHP 7.4+), Contact Form 7 5.2 cannot work in the PHP 5.2 to 5.5 environments.
Contact Form 7 5.1.5 is now available. This is a maintenance release that includes some improvements. Version 5.1.5 is the first to have been tested with WordPress 5.3.
Flamingo 2.1 is now available. You no longer have to move spam messages to Trash manually since Flamingo does the task for you. Also, a new contributor has joined the Flamingo development team.
Contact Form 7 5.1.2 is now available. This is a maintenance release that includes some bug-fixes and improvements. If you use the Constant Contact integration, you will find the newly introduced contact list selector very useful.
Contact Form 7 5.1.1 has just been released. This release makes improvements to the server side validation process of reCAPTCHA.
If you use reCAPTCHA v3 with Contact Form 7 5.1 and feel that you get more spam through contact forms than before, upgrading to 5.1.1 might relieve the situation.
But, please read through this post before you run an upgrade. This is an important notice.