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Re: [OCLUG-Tech] how does current email protocol support mail receipt verification?

  • Subject: Re: [OCLUG-Tech] how does current email protocol support mail receipt verification?
  • From: "Derek Murphy (Simba 64 bit)" <derekm [ at ] NightTiger [ dot ] ca>
  • Date: Sat, 7 Jan 2012 09:11:04 -0500 (EST)
Hash: SHA1

On Fri, 6 Jan 2012, Robert P. J. Day wrote:

 we started talking about sending out email, and whether it was
technically possible to "verify" whether an e-mail was received and/or

To verify whether the mail in question reached the destination mail *server*, look in the sending Mail Transfer Agent server's logs; if it used Sendmail the last line referencing that mail has a "stat=sent" and maybe a reference number from the receiving machine. Other MTAs will have their own versions of that...

Whether the message was received or not by the *human* could only _sort_of_ be verified by checking the mail logs on the recipient's mail server, assuming that the machine in question _keeps_ logs. (I'm told by clients that the logging capabilities of Microsoft Exchange lead much to be desired...)

There will be log lines to the effect that the message arived, and other lines (perhaps in a different logfile?) to the effect that the client's workstation/handheld/whatever had retreived said mail.

As to whether or not the human actually *read* the message, the only way to verify _that_ is to ask them... unless they lie to you...

- -- Derek T. Murphy <DerekM [ at ] NightTiger [ dot ] ca>
	      Night Tiger Inc.  Kanata,  Ontario,  Canada
 System Administration/Network Security  GPG key at www.NightTiger.ca
         "The answer *is* computers. What's your _question_?"
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