iis smtp nntp: Timestamps -- iis smtp nntp

Re: Timestamps

Nigel
1/25/2005 6:55:03 AM

Thanks Jeff for a prompt answer, Oops probably not asking the right question,
if a user in Japan using MS Exchange has the MS Internet gateway in the USA,
then what time should the sent time be, Japan time or USA?

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Re: Timestamps

Jeff Henkels
1/25/2005 8:19:01 AM

Yes, it does. The RFCs governing e-mail require the SMTP server to
timestamp all messages that pass through it (both inbound and outbound) with
a Received: line in the RFC-822 header -- these lines appear in reverse
order (the first line is the last SMTP server the message passed through).

These days, most e-mail is sent directly from the sender's SMTP server to
the recipient's, so you'll normally see only two Received: lines in the
RFC-822 header, the first from the recipient's SMTP server, the second from
the sender's. Back in the days of uucp and bang paths, you could see many
Received: lines, allowing you to trace the message's route through the net.

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Re: Timestamps

Jeff Henkels
1/25/2005 3:10:07 PM

Not sure -- I'm not a big Exchange user. If by "MS Internet gateway", you
mean the sender's Exchange server, the timestamp will be the local time of
the gateway, plus a correction factor (i.e. the # of minutes you add or
subtract) to convert UTC to that time. E.g. a message that hits the gateway
at 3:00 PM PST will have a time stamp of 15:00:00 -0480 (480 being the # of
minutes you subtract (because of the - sign) from UTC to get that
timestamp).

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Re: Timestamps

Andrew Hodgson
1/25/2005 10:09:03 PM

On Tue, 25 Jan 2005 06:55:03 -0800, "Nigel"
[quoted text, click to view]

Probably USA, depends on how its been implemented though. If the
Exchange server in Japan pushes the message out to a server in the US
then it will be Japan time in the date header. The issue here is that
Exchange from 2000 for some strange reason doesn't create Received
headers, even though the email may have gone through a few servers, so
it gets harder to trace.

Andrew.
--
Andrew Hodgson in Bromyard, Herefordshire, UK.

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