it forces you to set a Reply-To address

I’m unfortunately not satisfied with Site Mailer because it forces you to set a Reply-To address in the plugin settings. There is no option to leave this field empty.

For websites that use advanced form plugins like JetFormBuilder, the Reply-To address should be managed within the form itself (for example, replying directly to the email address entered by the visitor). Because Site Mailer always adds its own Reply-To header, it interferes with this behavior and results in replies being sent to multiple addresses.

It would greatly improve the plugin if the Reply-To field could be left empty or disabled, so form plugins can fully control the email headers. At the moment this limitation makes Site Mailer difficult to use in combination with more advanced form setups.