Form fails, and Reply-To address question

I was just asked to look at a site where the forms are all throwing a similar “orange box” error as are being cited in several postings here. I have read and tried several steps that have been recommended for troubleshooting the issue, with no luck so far. Plus, I have an issue with the old developer’s email address showing up in the Reply-To part of the attempted form submission.

Steps taken so far:

Updated all plugin and themes.

I built a new test form with just the basics.

The JavaScripts are properly loaded in the footer of the source code, so it isn’t the theme blocking JavaScripts.

I checked the From email address on the forms, and it is a valid email address ending with the same domain name.

There is no recaptcha on the form, so it isn’t failing there.

I checked the WP error log file at wpengine.com, and there is no error listed.

The site was using the Contact Form Advance Database plugin, and no recent entries were shown there, so it is failing prior to adding the form contents to that database. I tried disabling that plugin, but still got the dreaded orange box error.

The failed submissions ARE showing up in the WP MySQL database. One thing I noticed is that the prior developer’s address showed up in the “Reply To” section of the MySQL entry. There was no “Reply To” address entered in the Additional Headers box. I am still trying to find where that address is stored to be added to a new form created after he was long gone.

Any help in fixing the failed submission issue as well as finding where this old developer’s address is stored to be used in my new forms from would be most appreciated!

I replaced some identifying names and site addresses to protect their innocence or guilt as the case may be! ??

From the snippet below:

nReply-To: [email protected]

This is the address that is somehow getting added when no “Reply-To” is set in the form’s headers.

THANKS FOR ANY HELP!

CR

(25118, 6916, ‘2019-01-15 21:29:19’, ‘2019-01-16 02:29:19’, ‘[text* text-806 placeholder \”Your Name\”]\r\n\r\n[email* email-405 placeholder \”Your Email\”]\r\n\r\n[tel* tel-987 placeholder \”Your Phone\”]\r\n\r\n[textarea* textarea-840 placeholder \”Brief Message\”]\r\n\r\n<br />\r\n\r\n[submit \”Send Message\”]\n1\nTest from Weston Website\[email protected]\[email protected]\n–\r\nThis e-mail was sent from a contact form on Weston Nurseries\n\n\n\n1\n\n[your-subject]\nWeston Nurseries <wordpress @www.westonnurseries.com>\n[your-email]\nMessage Body:\r\n[your-message]\r\n\r\n–\r\nThis e-mail was sent from a contact form on Weston Nurseries (https://www.westonnurseries.com.php53-24.ord1-1.websitetestlink.com)\nReply-To: [email protected]\n\n\n\nYour message was sent successfully. Thanks.\nFailed to send your message. Please try later or contact the administrator by another method.\nValidation errors occurred. Please confirm the fields and submit it again.\nFailed to send your message. Please try later or contact the administrator by another method.\nPlease accept the terms to proceed.\nPlease fill in the required field.\nThis input is too long.\nThis input is too short.\nDate format seems invalid.\nThis date is too early.\nThis date is too late.\nFailed to upload file.\nThis file type is not allowed.\nThis file is too large.\nFailed to upload file. Error occurred.\nNumber format seems invalid.\nThis number is too small.\nThis number is too large.\nYour answer is not correct.\nYour entered code is incorrect.\nEmail address seems invalid.\nURL seems invalid.\nTelephone number seems invalid.</wordpress>’, ‘Test Contact’, ”, ‘publish’, ‘closed’, ‘closed’, ”, ‘hopkinton-contact_copy-5’, ”, ”, ‘2019-01-21 11:58:41’, ‘2019-01-21 16:58:41’, ”, 0, ‘https://www.westonnurseries.com/?post_type=wpcf7_contact_form&p=25118&#8217;, 0, ‘wpcf7_contact_form’, ”, 0),

The page I need help with: [log in to see the link]