I’ve been using Tectite mailscript for several years for my exported sites, works fine and it even supports email template in html .
Here is the original post I found it in How To on using your own form processor with webflow form
Totally free, I think it is odd to pay monthly fee for your mail forms. Little subscription here, little there and it builds up to be a hundred a month with all the cookie bots, amazons (since we still can’t upload any file to our own hosting on Webflow…oh well), zapiers etc…
Super grateful to @adtastic for sharing this solution, saved me quite some money and time