CF7 not sending emails

Version 5.4

Active Plug-ins installed:
Duplicate Page
Facebook for WordPress
FooBox Image Lightbox
FooGallery (Premium)
Wi:Portfolio
Wi:Shortcodes

Deactivated Plug-ins:
Elementor
FooGallery
MOJO Marketplace
Redirection
Visual Composer
W3 Total Cache
Yoast SEO

• This reply was modified 4 years ago by ddt123.

Roll back CF7 to version 5.3.2 and try again.

How to:
Install https://www.ads-software.com/plugins/wp-rollback/ (WP Rollback)

After installing and activating, go to “Installed plugins” and near each of the plugins you’ll see a “Rollback” option.

Click it and select version 5.3.2.

After it’s done, click “activate plugin” in the final window to activate the installed version.

• This reply was modified 4 years ago by avniy.

Just installed WP Rollback and downgraded to Version 5.3.2
That did not resolve the issue
I also tried Version 5.3.1

• This reply was modified 4 years ago by ddt123.

Cleared all cache and still sends emails via desktop but not from mobile devices. The behavior changed though… instead of receiving an error it now has the eternal spinning wheel.

Did you activated the Captcha V3?
For me it was the problem & i disabled it for the moment
Also I installed the Flamingo Extension, to detect Spam-Problems

@avniy I rolled CF7 back to 5.3.2 then emptied all caches using the WP Total Cache plug-in. I then deactivated W3 and tried again. I’m getting the spinning circle.

@tommyfrog I installed the “Disable Recaptcha – CF7” plug-in which didn’t result in any changes. I’ve seen a lot of mention of Flamingo. What does it do and is it something I need? I try to keep as few plug-ins installed as needed but will definitely use it if it makes anything better.

flamingo detects all mails which are sended by contactform-7 (also when you get a error message “can’t send” in case of spam mail)
it’s developed by contactform-7
it will show the potential spamcore of single mail
for me it was a good tool, to understand, why i get a error message & to save every mail

i unregistered the captcha not by plugin, just delet the captcha keys in contactform
after that i can send mails, but also I get so much spam-mails

but first of all: check if your Mailserver is working, f.e. you can send mails by wp_mail() -> plugins are available

I deleted the recaptcha keys, cleared cache, then tried again. it still have the spinning circle on mobile

• This reply was modified 4 years ago by ddt123.

Update: After deleting the recaptcha keys and clearing cache, I downgraded CF7 to 5.3.2 (I had auto-update turned on therefore it kept updating each night). Now the ‘send’ button is totally unresponsive, not even a spinning circle.

any suggestions? @avniy @tommyfrog