Contact Form works but error messages

Hi,

I’ve looked at the doucmentation and FAQs etc, and specifically the configuration errors guidance and invalid mailbox syntax guidance but still unable to resolve the issue.

My Form tab code is:

* indicates required field
<label> Person to contact* 
[select your-recipient "Chairman|<[email protected]>"
                    "Membership|<[email protected]>"
                    "Coaching|<[email protected]>"
                    "Other|<[email protected]>"] </label>

<label> Your name*
    [text* your-name] </label>

<label> Your email*
    [email* your-email] </label>

<label> Subject*
    [text* your-subject] </label>

<label> Your message (optional)
    [textarea your-message] </label>

[submit "Submit"]

In the To field on the Mail tab I have:
[_site_admin_email][your-recipient]

The contact form works as the “your-recipient” receives the email. However, no email seems to get to the “_site_admin_email” even though “your-recipient” has stated that the “_site_admin_email” does show up in the list of email addresses in their email they received.

However, I actually don’t want the email to go to “_site_admin_email” anyway, and this is when I get the configuration error & mailbox syntax issues. I remove it by amending the To field from
[_site_admin_email][your-recipient]
to
[your-recipient]
…but I then get the “1 configuration error detected” and “Invalid mailbox syntax is used”.

Any ideas how to resolve?

The theme and plugin details are below…
Theme: Fotofly Version: 2.4
Plugins:

Akismet Anti-Spam | Version 4.1.9 | By Automattic

Coming Soon Page, Maintenance Mode & Landing Pages | Version 6.2.1 | By SeedProd

Contact Form 7 | Version 5.4 | By Takayuki Miyoshi

Elementor | Version 3.1.4 | By Elementor.com

Fotofly Core | Version 2.4 | By frenify

Loginizer | Version 1.6.6 | By Softaculous

Redux Vendor Support | Version 1.0.1 | By Team Redux

Thank you.