Ory is the largest open source community in the world for cloud software application security. We maintain advanced open source security software solving authentication, authorization, access control, application network security, and delegation. Ory implements a variety of industry and best-practice standards including OAuth 2.0 / OAuth 2.1, OpenID Connect, Zero Trust Networking, Google Zanzibar Policy Framework, FIDO2 U2F, WebAuthn, TOTP, and more.

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You can use your own SMTP yes!
There is documentation here: <https://www.ory.sh/docs/kratos/concepts/email-sms#sending-emails-via-smtp>

We are also working on updating that to make it clearer how to use with Ory CLoud and I am also working on a tutorial.

In a nutshell you have to export the configuration and add your own smtp server and then import the config again.

Oh wait here is the updated guide <@U03JXE4E24D> <https://www.ory.sh/docs/guides/emails>