On 09.11.2017 03:04, Michael B Allen wrote: > From a spam perspective, it doesn't really matter if the message is > protocol correct.
I don't know what you mean by "protocol correct" re trace information. In any case, https://tools.ietf.org/html/rfc5321#section-4.4 states: When an SMTP server receives a message for delivery or further processing, it MUST insert trace ("time stamp" or "Received") information at the beginning of the message content [...] Postfix does what is required. If you consider the generated trace info too revealing and therefore plan to alter it, you might as well remove the whole Received line during submission cleanup. Both modification and omission are violations of An Internet mail program MUST NOT change or delete a Received: line that was previously added to the message header section. Source as before. Choose your poison, or leave it to Postfix, which is not overly chatty with default settings as Matus Uhlar pointed out. Personally, I sometimes like to have even more info added by using smtpd_tls_received_header=yes . -Ralph
