Captch Failing on Multisite and delivery failing with certain emails

Hi Mike

We have two large problems for you today. Both of them quite urgent. Our clients have lost functionality with their contact forms, and we’d like to resolve this as soon as possible with your help.

We run a large multisite of 175+ sites that all use your plugin.

1) Certain email addresses are simply not receiving any emails submitted through their forms.

On this page https://sandkautos.boschauto.co.uk/contact-us/ we have a contact form submitting to their bosch email address ( redacted ) which doesn’t work, no matter how we send it. However, as soon as we change the email address to one of our own, we receive the email within seconds.

This same problem has occurred for other garages, but only with their garage email. Again, our personal email works well with their contact forms.

What is going wrong?

2) Since the update from a few days ago, the captcha forms on our multisite are not submitting, despite entering them correctly each time. We get the message “That CAPTCHA was incorrect. Try again.”

We could remove every single Captcha form, but that would take a large chuck out of my day.

Do you know why this is happening? Do we need to change any settings?

You assistance is appreciated and we’re happy to donate to this plugin.

Many thanks
LW Design

https://www.ads-software.com/extend/plugins/si-contact-form/