I appreciate your response, but this seems pretty lame. As an alternative I am using a button with a email address meaning that the user will fill in the subject line herself and send it using her own email provider. Most mobile devices now use IMAP, which should be more reliable than SMTP. But in any case, if the Webflow form submission process is this unreliable they have an obligation to inform their users about it. I’m glad I only paid for one month for my site.