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Add and remove email addresses from the Blocked Senders List by using EWS in Exchange

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Find out how to use the EWS Managed API or EWS to add email addresses to and remove them from the Blocked Senders List.

The Blocked Senders List in a user's Junk Email options provides a way to move all email messages from specified senders to the Junk Email folder. You can enable your EWS Managed API or EWS application to add email addresses to or remove them from the Blocked Senders List.

Note that a message from the email address must exist in the user's mailbox before you can add the email address to or remove it from the Blocked Senders List. The ExchangeService.MarkAsJunk EWS Managed API method and the MarkAsJunk EWS operation use a collection of item IDs. The item IDs in the collection indicate messages in the mailbox for which the junk mail status should be changed.

You can use the Get-MailboxJunkEmailConfiguration and Set-MailboxJunkEmailConfiguration Exchange Management Shell cmdlets to access the Blocked Senders List directly.

Add an email address to or remove it from the Blocked Senders List by using the EWS Managed API

To add the sender of an email message to the Blocked Senders List, use the MarkAsJunk method and set the isJunk parameter to true. To remove the sender of an email message from the Blocked Senders List, set the isJunk parameter to false.

The following example shows how to use the MarkAsJunk method to change the junk status of a message.

private static void MarkMessageAsJunk(ExchangeService service, ItemId messageId, bool isJunk, bool moveItem)
{
    List<ItemId> junkItemIds = new List<ItemId>();
    junkItemIds.Add(messageId);
    ServiceResponseCollection<MarkAsJunkResponse> responseCollection = null;
    try
    {
        // If isJunk is true, the sender of the email message is added to 
        // the Blocked Senders List. If isJunk is false, the sender is removed
        // from the list (if present).
        responseCollection = service.MarkAsJunk(junkItemIds, isJunk, moveItem);
    }
    catch (ServiceResponseException ex)
    {
        Console.WriteLine("Error marking item as junk: {0}", ex.ErrorCode);
        return;
    }
    foreach (MarkAsJunkResponse response in responseCollection)
    {
        if (response.Result == ServiceResult.Success)
        {
            Console.WriteLine("Successfully marked message as {0}junk.", isJunk ? "": "NOT ");
            if (moveItem)
            {
                Console.WriteLine("New item ID: {0}", response.MovedItemId.ToString());
            }
        }
        else
        {
            Console.WriteLine("[{0}]: {1}", response.Result.ToString(),
                response.ErrorCode.ToString());
        }
    }
}

Add an email address to or remove it from the Blocked Senders List by using EWS

The following EWS SOAP request marks an item as junk by setting the IsJunk attribute on the MarkAsJunk element to true. It also moves the message to the Junk Email folder by setting the MoveItem attribute on the MarkAsJunk element to true.

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" 
    xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types" 
    xmlns:soap="https://schemas.xmlsoap.org/soap/envelope/">
  <soap:Header>
    <t:RequestServerVersion Version="Exchange2013" />
  </soap:Header>
  <soap:Body>
    <m:MarkAsJunk IsJunk="true" MoveItem="true">
      <m:ItemIds>
        <t:ItemId Id="AAMkADg1OWUwODcyLTg4M2MtNDAyMS05YjI0LTI5ZGM5OTU4Njk3YwBGAAAAAADPriAxh444TpHj2GoQxWQNBwAN+VjmVZl5Rq1ymCq5eFKOAAAAAAENAAAN+VjmVZl5Rq1ymCq5eFKOAAAAAAEuAAA=" 
            ChangeKey="CQAAABYAAAAN+VjmVZl5Rq1ymCq5eFKOAAAAAADi" />
      </m:ItemIds>
    </m:MarkAsJunk>
  </soap:Body>
</soap:Envelope>

The following EWS SOAP response shows the successful response. The MovedItemId element in the response contains the item ID for the item after it was moved.

<?xml version="1.0" encoding="utf-8"?>
<s:Envelope xmlns:s="https://schemas.xmlsoap.org/soap/envelope/">
  <s:Header>
    <h:ServerVersionInfo MajorVersion="15" MinorVersion="0" MajorBuildNumber="712" MinorBuildNumber="22" Version="V2_3" 
        xmlns:h="http://schemas.microsoft.com/exchange/services/2006/types" 
        xmlns="http://schemas.microsoft.com/exchange/services/2006/types" 
        xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" />
  </s:Header>
  <s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <m:MarkAsJunkResponse xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" 
        xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
      <m:ResponseMessages>
        <m:MarkAsJunkResponseMessage ResponseClass="Success">
          <m:ResponseCode>NoError</m:ResponseCode>
          <m:MovedItemId Id="AAMkADg1OWUwODcyLTg4M2MtNDAyMS05YjI0LTI5ZGM5OTU4Njk3YwBGAAAAAADPriAxh444TpHj2GoQxWQNBwAN+VjmVZl5Rq1ymCq5eFKOAAAAAAEbAAAN+VjmVZl5Rq1ymCq5eFKOAAAE59DIAAA="
              ChangeKey="CQAAABYAAAAN+VjmVZl5Rq1ymCq5eFKOAAAE59E+" />
        </m:MarkAsJunkResponseMessage>
      </m:ResponseMessages>
    </m:MarkAsJunkResponse>
  </s:Body>
</s:Envelope>

See also