greetings, I'm using a postfix server on a remote vps for all the email domains I control. it is the official MX for all those domains and it only accepts to relay email from my_networks and SASL authorized clients. I am playing with the idea of making postfix remove all the Received headers of authorized outgoing messages, before sending them to the Internet.
The reasons is I've been asked to not show outside "where" an user was when he or she composed an email: at the webmail interface in some remote location, at home, office or anywhere else: "can you make it so that all messages look like they were composed on the server itself? Now, I have already done some research and found I could put: /^Received:/ IGNORE in a header_checks file, but a couple of things aren't clear to me. 1) I need to not remove headers of messages *coming* from the Internet to my users. Does this trick remove ONLY the Received headers of _outgoing_ messages? If yes, and here's the real question, why? Why is the check done only for outgoing messages? I'm missing how Postfix works here 2) In this thread http://www.nabble.com/Hide-internal-address-(Postfix)-td2300995.html a user said: If you do so, aren't your mails rejected by some mail servers because they consider that you have an illegal or incomplete header? how big such a risk is? I imagined that if mail seems "born" on a server which is the official MX of a domain it should look as legal and complete as it gets, isn't it? If the risk does exist, can it be removed, and how? Finally, besides looking spammish, are there any other reason NOT to do this? Since this is not a public isp and I serve only a very small number of users I know, diagnosing troubles that THEY (not external senders) may have isn't a big deal TIA, Marco -- Your own civil rights and the quality of your life heavily depend on how software is used *around* you: http://digifreedom.net/node/84
