Hello, marketo emails get caught up in the postini spam filter (used by gmail and many companies) because they do not use SSL ("https" instead of "http" for images and links).
I reached out to marketo support and was told TLS SSL (the email encryption version of SSL) is not a product that you currently have as an option (Marketo has SSL for landing pages but that works completely different then the email version).
Is it possible to give us this option in the future?