Hi, I would like to re-write the Received header on some messages being sent using ESMTPSA through my mail server. Specifically the header I would like to re-write currently looks like the following (names have been changed to protect the guilty):
" Received: from workstation.busihome.local (pool-101-2-122-10.nwrknj.fios.verizon.net [101.2.122.10]) (Authenticated sender: mike) by mail.busicorp.com (Postfix) with ESMTPSA id 987567F1 for <iop...@gmail.com>; Wed, 8 Nov 2017 00:21:52 -0500 (EST) " There's way too much information in there! I'm thinking the re-written header could look something more like: " Received: by mail.busicorp.com (Postfix, from userid 501) id 987567F1; Wed, 8 Nov 2017 00:21:52 -0500 (EST) " This replacement header format was reconnoitered from a message I sent using sendmail on the commandline on the mail server itself. Meaning I want messages (or at least the messages that match the pcre expression that I will ultimately use) to appear as though they were sent directly from a client on the mail server itself. There is simply no reason why anyone needs to know that I'm sending emails from home in my bunny slippers. I am sending mail almost exclusively to large companies that frequently use aggressive mail filtering appliances. I do not use my business email to communicate with civilians and gmailers. So the question is, is there anything about this re-written header that could be interpreted as spam? Will the resulting message be^Hlook legit? Is there a less spammy looking way to do this in general? Second, many folks are apparently removing this header entirely. That seems sloppy to me but if you think otherwise, please tell me about it. Additionally, my current understanding is that I can implement this with smtp_header_checks and a PCRE expression. If that is not the correct method, please give me a pointer. Mike
