Hey @Filipe Oliveira! Thanks for reaching out :gigipixel:
Thanks for exploring Zitadel! Let's see if we can get this sorted c: Can you give me some more insight into how you've connected mailgun? Did the SMTP credentials work when tested outside of Zitadel?
Can you also check the Zitadel logs? docker logs <your zitadel container name>docker logs <your zitadel container name>
No worries! Thanks for sharing your solution as well, this is super helpful and I'll be sure to reference this if any other community members have this issue!