'C# Add-In (VSTO .NET): Add domain name to outlook junk-email list
With the Outlook UI you can add an email address to your junk-email list, you can add a domain name as trusted domain, but you can't add a domain name to your junk-email list. You must manually edit the email address in your junk-email list to achieve that, so I wrote an Add-In to do this for me, but cant find the method to do that. Apparently the Outlook object model doesn't provide anything for that.
Is there a code workaround for this fatal limitation?
Solution 1:[1]
That is correct. Outlook Object Model does not provide any means to access or manipulate Junk Email settings.
You can try to use Extended MAPI (C++ or Delphi) to build the MAPI server side rule that lists all the blocked senders, but it is definitely not for the faint-hearted.
If using Redemption (I am its author) is an option, it exposes RDOJunkEmailOptions object (returned from RDOSession.JunkEmailOptions, RDOAccount.JunkEmailOptions, RDOExchangeMailboxStore.JunkEmailOptions), which allow to add blocked senders using RDOJunkEmailOptions.BlockedSenders.Add.
Sources
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Source: Stack Overflow
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