Allow reply-to to be set via form

[spammads]

Thanks for this great service.
It would be very nice to be able to explicitly set reply-to via form/api.
The reply-to is now always the from-field.
But in a contact-form, where a generic smtp sends the mail you don’t want to reply to a no-reply-smtp-address but the person who actually contacted you.
Again. Many thanks for this great and lightweight service. Great alternative to the cloud-services.