BCC receipients are sometimes missing

Question

We receive e-mails that have recipients in the "BCC" line.

We know that the IMail object allows us to get the list of "BCC" recipients but during our trials with that property, it seems that it is not consistently providing the list of recipients correctly - sometimes it does, sometimes it does not.

Can you please advise why this behaviour - or provide syntax or example of use so that we can determine that it is not our error in coding.

Answer 1

BCC header should be empty for all emails you receive.
The reason is that BCC recipients shouldn't be revealed to any other
recipients and each other.

In some cases (this depends on how sending client behaves)
it may contain recipient email address.

Mail.dll always tries to parse BCC header however.