Hello,
I was able to do it in the following way.
remove_filter( ‘wpcf7_mail_html_body’, ‘wpcf7_mail_html_body_autop’, 10 );
function bs_wpcf7_mail_html_body_autop( $body ) {
return wpcf7_autop( $body );
}
add_filter( ‘wpcf7_mail_html_body’, ‘bs_wpcf7_mail_html_body_autop’, 10, 1 );
The point of the tweak is that string breaks will always be added for email, regardless of the WPCF7_AUTOP constant. This will not affect the output of the forms themselves.