Can’t change email address in “From” field

Where can we see the website in question?

For example on this page.

See Setting up mail

What email settings do you have in the Mail tab panel?

To protect personal data, hiding email addresses in the settings or replacing them with dummy addresses is strongly advised. You can also include screenshots.

Well, the settings are ok in my opinion. Only when an email is sent, the sender/company’s address isn’t displayed as set.

What other plugins and theme do you use on the site?

We are using the Divi theme and the following plugins:

All In One WP Security
Divi Torque Lite
Flamingo
Polylang
Redirection
Send PDF for Contact Form 7
Smush
UpdraftPlus – Backup/Restore
WP Mail SMTP
WP Rocket
Yoast SEO

Try switching to the default theme, deactivating all plugins excluding Contact Form 7, Flamingo and Yoast SEO, and clearing all cache data.

Why you are advised to deactivate plugins and switch to the default theme.

Thanks a lot for your support! Eventually it wasn’t a plugin incopatibility, but wrong settings in WP Mail SMTP.

Resolved.