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Old 3 Jan 2020, 12:21 AM   #1
sirboy1992
Junior Member
 
Join Date: Jan 2020
Posts: 2
Timestamps in E-Mail Header

Hello everyone,

I have a question concerning the posted E-Mail Header below. I ought to recieve an E-Mail at a certain time. I recieved it too late. The sender claims he sent it in time. How's the delay possible?

Could you please explain what can be deduced from the information below - was it a "technical issue" or could someone manipulate the timestamps? Thanks in advance!!
(My email is censored to [email protected] and the sender's one is censored to [email protected])

I copied this from my e-mail-site:


Received: from gmailer.gwdg.de ([134.76.11.17]) by mx-ha.gmx.net (mxgmx114 [212.227.17.5]) with ESMTPS (Nemesis) id 1MPHmP-1iLkoF2rEr-00Pco4 for <[email protected]>; Mon, 16 Dec 2019 15:02:46 +0100
Received: from excmbx-24.um.gwdg.de ([134.76.9.234] helo=email.gwdg.de) by mailer.gwdg.de with esmtp (GWDG Mailer) (envelope-from <[email protected]>) id 1igmoM-00036F-46 for [email protected]; Mon, 16 Dec 2019 10:37:06 +0100
Received: from excmbx-14.um.gwdg.de (134.76.9.225) by excmbx-24.um.gwdg.de (134.76.9.234) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Mon, 16 Dec 2019 10:35:58 +0100
Received: from excmbx-14.um.gwdg.de ([fe80::59fd:666a:7751:299b]) by excmbx-14.um.gwdg.de ([fe80::59fd:666a:7751:299b%20]) with mapi id 15.01.1847.005; Mon, 16 Dec 2019 10:36:31 +0100
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Old 3 Jan 2020, 09:51 AM   #2
Berenburger
The "e" in e-mail
 
Join Date: Sep 2004
Location: The Netherlands
Posts: 2,672
There was a 4 hours delay on hop 4.

Code:
Hop	Delay	From   By	With	Time (UTC)
1	*	excmbx-14.um.gwdg.de fe80::59fd:666a:7751:299b	excmbx-14.um.gwdg.de fe80::59fd:666a:7751:299b	mapi	12/16/2019 9:36:31 AM	
2	*	excmbx-14.um.gwdg.de 134.76.9.225	excmbx-24.um.gwdg.de 134.76.9.234	Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256)	12/16/2019 9:35:58 AM	
3	1 minutes	excmbx-24.um.gwdg.de 134.76.9.234	mailer.gwdg.de	esmtp (GWDG Mailer) (envelope-from <[email protected]>)	12/16/2019 9:37:06 AM	
4	4 hour	gmailer.gwdg.de 134.76.11.17	mx-ha.gmx.net 212.227.17.5	ESMTPS (Nemesis)	12/16/2019 2:02:46 PM
BTW, email is not suitable for instant messaging. Delay is always possible due to the nature of how email communication is built.
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Old 9 Jan 2020, 05:35 AM   #3
sirboy1992
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Join Date: Jan 2020
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Smile

Thank's for your reply. I understand that there is a 4 hour delay - but why?

And how are timestamps generated? By E-mail-sofware, by a server?
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Old 9 Jan 2020, 05:47 AM   #4
somdcomputerguy
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Join Date: Jun 2004
Location: Rupert, WV
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Quote:
Originally Posted by sirboy1992 View Post
I understand that there is a 4 hour delay - but why?

And how are timestamps generated? By E-mail-sofware, by a server?
I suspect the gmail mail server was busy or there were (was?) some internet hiccups before reaching that server.

The timestamps are generated at the server.

- Bruce
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Old 11 Jan 2020, 06:38 PM   #5
JeremyNicoll
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Join Date: Dec 2017
Location: Scotland
Posts: 192
Quote:
Originally Posted by somdcomputerguy View Post
The timestamps are generated at the server.
It's interesting that time appears to have gone backwards by 33 seconds on the first hop (between a pair of machines both on the same network). One would expect all the machines on the same network to have their clocks in sync.
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