SPAM on Exchange when using "anonymous" authentication on frontend connector

Hi all,
I have Exchange 2013 SP1 installation with all roles on one box. My initial configuration worked fine, I was able to send and receive emails just fine. Yesterday however, I noticed that emails were not flowing anymore and when I checked the Queue viewer,
I saw thousands of SPAM emails being sent - most of them sent to yahoo.com.tw domain. I managed to clean the Queue and I unchecked the anonymous authentication on the default frontend connector and the SPAM stopped but we cannot receive emails anymore (sender
gets 530 5.7.1 Client was not authenticated message).
As soon as I enable anonymous, SPAM starts again. I don't have an external relay, I am sending email directly from Exchange. Can you guys offer any advice as to how to go about this? How do I enable send/receive emails without getting all this SPAM?
DB

So, I managed to get a hang of it, we are in the process of acquiring a third party anti-spam solution, but in the meantime, I stopped spammers using my server by using the built in Exchange AntiSpam agents. I followed the suggestions in this article:
http://www.allspammedup.com/2013/11/exchange-2013-anti-spam-technologies-the-sender-filter-agent/
and set the sender filter agent to block certain addresses and, more importantly, to block empty sender messages. It is all fine for now, but I will keep monitoring it.
DB

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can you help me?
regards

hi,
pls refer the link
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try re-installing BOE and check
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Hi,
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I have a list with multiple columns where I need to sum a list of columns for each row into a new column (not 100% sure if there is another way to sum other than I have done it). Problem I'm having is being able to select more than just column I'm creating
used from summing the other column and the Key. Below will produce a row with the CustomerId and the total of all the months.
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Hi
ajl7519,
I have tested on my side, please check my code.
InitializeComponent();
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new AuctionItem() { Category = "Car", CurrentPrice = "100", Description = "100", SpecialFeatures = "100", StartDate = 3, StartPrice = 3 }
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You also can change your code to
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Have a nice day !
Kristin
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Error when using SAP authentication for Business object Designer

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Hello Barbella,
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SPAM on Exchange when using "anonymous" authentication on frontend connector

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