As UserVoice staff cleaned up the most of twisted voices, I’ve returning this suggestion to open discussion.
Everyone, please continue voting for this feature if you consider it important.
Thank you for your input. We will see if it’s possible to add a nice-looking and straightforward autoresponder to supported webmail clients. Note that Plesk already does provide this functionality.Max commented
you should be able to use this feature via dovecot + horde