This is my first post and I hope I am posting into the correct place. Long time user of ISPConfig but always found answers to my questions without posting myself. Here is my situation: We'd like to forward incoming messages to an external mailbox. I have tried both "Send copy to:" in the ISPConfig panel and with the ISPConfig roundcube forward plugin. But both methods are actually trying to resend the incoming message with the original sender address in the from field. Of course our ESP does not allow to send message originating from @gmail.com or outlook.com by our server. Any chance I can configure the server to use the receiving mailbox as from address when automatically forwarding messages? Our server is running on Debian 9 with ISPConfig 3.2.4 For the installation I used the perfect server tutorials accordingly. Thank you very much for your consideration.