I know they are going to say everything is fine with the mailing, but no. I have several websites installed and updated, but from version 5.2.7 we have problems with sending emails. One day, we got 3 thousand emails coming from the contact form.
After several tests, we realized that in version 5.2.6 this did not happen, I attach a video and I put the access data so that you can check it. And do your tests, I hope you can prove me that we are wrong, but honestly, I'm sure that after version 5.2.6 was lost a validation of google captcha.
We are waiting for your answer,
thank you very much