Yes, Ory Kratos allows you to customize the error messages and email templates. For email templates, Ory Identities comes with built-in templates for all messages sent by the system. You can replace these default templates with custom ones that can carry your own branding, visual elements, and communication tone. To use custom email templates, follow these steps: 1. Go to Customize → Email Configuration on the [Ory Console](https://console.ory.sh/projects/current/email-configuration) and select the email template you want to customize from the Email Templates section at the bottom of the page. 2. List all your projects and get the Ory Identities config file:

shell ## List all available projects   ory list projects      ## Get config   ory get identity-config <project-id> --format yaml > identity-config.yaml

3. Add your Base64-encoded custom message templates to the config:

yaml courier:    smtp:    from_name: MyProject via Ory    templates:    recovery:    invalid:    email:    body: { "html": "<base64://ENCODED_HTML_TEMPLATE>", "plaintext": "<base64://ENCODED_PLAINTEXT_TEMPLATE>" }    valid:    email:    body: {}    verification:    invalid:    email:    body: {}    valid:    email:    body: {}    login:    valid:    email:    body: {}    registration:    valid:    email:    body: {}

4. Upload the edited config:

shell ory update identity-config <project-id> --file updated_config.yaml

In the Ory Network, you can use only Base64-encoded templates.

http://

or

file://

URIs are not supported. If you provide custom templates using unsupported methods, the system uses the default templates. For more details, you can refer to the [Ory documentation](https://www.ory.sh/docs/kratos/emails-sms/custom-email-templates). As for customizing error messages, the provided extracts do not contain specific information on how to customize error messages in Ory Kratos. You may want to refer to the official Ory Kratos documentation for more information on this topic.