[EMAIL PROTECTED] wrote:

I am under the impression that an email message actually is broken up
into "packets" of information, that each packet travels through different
smtp relaying servers until it arrives at the destination, and that then
the packets are reassembled into the email message, AND -- here is my
question -- that the headers reflect where all the various packets have
traveled?  Is this correct?
Yes and no. I'm no expert, but my understanding of TCP/IP is that although transmissions are broken up into packets and re-assembled at the destination, this all happens "under the covers". The SMTP server never sees anything but a complete message. The headers reflect the "big picture" route that the message took, while the "nitty-gritty details" are never reported to -- or recorded by -- the SMPT servers.

In simpler terms, the headers reflect the points in the message's journey when all the packets were re-assembled, even if only temporarily.

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