Emails not being sent when using templates

[Amanb1145]

Hey All,
I am trying to move to Mailjet from Mailchimp but I am facing an error when I pass the Variables and set TemplateLanguage to True.
I am getting "Status": "success" but not getting the mail and if is don't set TemplateLanguage then I am gettiing the mail but can't set the variables.

any ideas??

[skupriienko]

Hey there! 👋

Thanks for reporting this and for your patience. We've thoroughly investigated the issue and can confirm that the Python SDK correctly serializes the TemplateLanguage and Variables fields and successfully delivers them to the Mailjet API (which is exactly why you're receiving a "Status": "success" / 200 OK response).

Since the SDK completes its job successfully, the issue usually stems from the payload format or the Mailjet template itself. Here are the two most common reasons for this behavior:

1. Data Type Mismatch: Ensure you are passing a standard Python dictionary to the Variables field (e.g., "Variables": {"name": "John"}), not a pre-serialized JSON string.
2. Template Syntax (Case Sensitivity): Ensure the exact case matches between your Python dictionary and the Mailjet template variables. For instance, if you send {"name": "John"}, your template must strictly use {{var:name}} and not {{var:Name}}.

To guarantee absolute reliability, we've just added dedicated offline unit and live network integration tests for this exact scenario. You can confidently rely on this behavior.

These tests and our new robust error handling will be officially included in our upcoming release. Let us know if checking the dictionary format or template syntax resolves the issue for you!

[skupriienko]

Closing the issue because it was tested in #125