Issue with going live and mail

Hi. We're making a site live today and previously we were testing with mailtrap and now for live using mailgun. I have a Digitalocean droplet that we had the test app on, and then today when I want it to go live, i switched everything over to production and checked everything, before pointing the old domain to the new.

The issue I've just hit is that every time I try to send an email it wants to use mailtrap.

Ive updated the .env to reflect the correct details and have run the following. I've checked for other configs and theres no sign of any use of mailtrap anywhere.

 php artisan cache:clear
    php artisan view:clear
    php artisan route:clear
    php artisan clear-compiled
    php artisan config:cache

If i update the env file it reflects on the app, just ignores the mail settings.

All the settings are pointing to mailgun... I just don't get it! Theres no custom config that should interfear with this.

Any ideas?