Am I right in thinking that the SendGrid Plugin doesn’t support the dynamic transactional templates.
I tested and it works fine with the legacy transactional templates but as soon as you use a dynamic template ID you get an error message back from SendGrid.
Just FYI for anyone using dynamic Transactional emails with the Send Emails with Sendgrid plugin. They are using handlebars, so %VAR1% becomes {{VAR1}} in your templates. The plugin page directions are incorrect for using this type of template.
There now is field-level documentation for the Send emails with SendGrid plugin which include examples and tips, such as the Template ID field requiring template prefixed with ‘d-’ and so on. We’ve already updated the documentation that’ll come bundled in the next update.