CODEWITHSUNDEEP
headeroutlookoutlook-addinoutlook-2010mailitem
Toon Casteele
Toon Casteele

Reputation: 2579

Keep Outlook mailItem property (internet header) from being removed when forwarded/replied

I'm trying to start up a thread of mails defined by the same ID (ID needs to be a specific value equal to the one in our database). I can assign a custom internet header just fine like this:

sendMail.PropertyAccessor.SetProperty("http://schemas.microsoft.com/mapi/string/{00020386-0000-0000-C000-000000000046}/DCPID", taskId);

Where the sendMail is an olMailItem and taskId is the id needed.

When this mail is sent and recieved I can get my ID with the GetProperty method but when forwarded or replied the internet header gets removed and I can't access this property anymore.

Is there a way to keep your custom internet header from being removed, no matter where it goes?

Upvotes: 1

Views: 918

Answers (1)

Dmitry Streblechenko
Dmitry Streblechenko

Reputation: 66276

No, there is no way to preserve a custom message header on reply or forward.

Upvotes: 1

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