tags:

views:

32

answers:

1
Q: 

Identifying Email Messages by IDs

I was wondering if anyone knew whether there is a unique identifier attached to an email that I can use to verify whether emails are the same? I know about the EntryID and PR_SEARCH_KEY, but i need something abit more specific if it exists.

Supposed I forward an email to 3 people. I want to make sure that at most 1 copy of those forwarded emails is added to a database. Is there an identifier that will be shared between those three emails that i can record and use to disallow entry of the other two? Or will I have to add a manual tag somewhere on the email?

thanks

+1  A: 

The obvious answer is the Message-ID, which all good emailers use. However, not everyone in the world uses it.

barrycarter  2010-05-31 19:21:54
RFC 2882 upgraded "Message-ID" to a SHOULD implement category. These days, it could be argued that mail without a Message-ID SHOULD be discarded, or at least complained about by Jamie's application. http://www.apps.ietf.org/rfc/rfc2822.html#sec-3.6.4
msw  2010-05-31 19:33:12
How do you actually access that property though? I'm using C# (in outlook 2003) so theres no direct way to get to them. I tried writing a marshalling wrapper to do the go between, but I can't get it to work. What would it's MAPI address be?Thanks for the help so far
Jamie  2010-06-01 14:47:25
I don't really use C#, so I can't really answer that. Can you access the raw headers of the email? If so, look for a line that starts "Message-ID".
barrycarter  2010-06-01 16:57:10

related questions

Using CreateItemFromTemplate to process an olEmbeddeditem Outlook attachment
Connecting Outlook 2007 to Domino 6.5 ?
How to find out the distinguished name of the information store to feed to IExchangeManageStore::GetMailboxTable?
What is the best library to parse a pst email archive? I looked for a file description but couldn't find anything on google.
MS Outlook VBA - When is a MailItem not a MailItem?
Outlook + Perl + Win32::Ole: How do you select calendar entries sorted by date?
What emails clients are being used out there?
Using Outlook API to get to a specific folder
Outlook 07 2 column flexible layout
What's the best library for reading Outlook .msg files in Java ?
How do I keep RecipientTime when executing MailItem.Move in an Outlook macro?
Mail Storage Quota Checker in C#
How do I assign a keyboard shortcut to a VBA macro in Outlook 2007?
How can I export Shared Outlook Calendars?
Outlook Email via a Webpage
good directory picker for visual basic macros in MS Outlook (2007)
Inbox Management (in Outlook)
My very own customized Outlook 2007 inbox
Outlook synchronization on multiple machines
Outlook Add-in using .NET
Accessing an Exchange Server without Outlook
Read from .msg files
simultaneous Outlook reminders on multiple devices
Standard Signature a Text in a Message using Exchange Server
what client(s) should be targeted in implementing an ICalendar export for events?