Hi, I need to rewrite From: field for every mail sending out from one domain but I also need disable this rewrite if sending mail come from the same domain. For example betwen two accounts [email protected] and [email protected] I can rewrite in that way, only if i send mail from my webmail but when Im using desktop mail client this rewrite it doesnt work. I use generic map like this @domain.con [email protected] and header_checks like this /^X-Sender:.*@domain.com/ REPLACE X-Sender: [email protected] How Can I configure postfix to rewrite also mail sending via mail clinet such as thunderbird or windows live mial Any idea?