Send mail -> Combine Plain Text and HTML format to reduce SPAM probability

Hi,
One of the recommendations in order to reduce the probability of having the outgoing emails tagged as SPAM is to include both Plain Text and HTML in the body of the email
However, in wappler, we can either choose HTML or Plain Text, any workaround to be able to have both formats at once and improve the probability of having the outgoing mail not tagged as SPAM?
Thank you!