Home
>
Software
>
Removing Incoming Email in MS Exchange, C# Example

Removing Incoming Email in MS Exchange, C# Example

The purpose of one of our projects was MS Exchange handler for processing incoming email.

The basic source of knowledge was this article "Developing Managed Event Sinks/Hooks for Exchange Server Store using C#" by Logu Krishnan, published to the address http://www.codeproject.com/csharp/csmanagedeventsinkshooks.asp, and also examples from Microsoft Exchange SDK.

We utilized Synchronous Events and created the handler, which fires on OnSyncSave event. The handler creates activity record in Microsoft CRM and then removes the message in the Exchange database before the commitment:

public void OnSyncSave(IExStoreEventInfo pEventInfo, string bstrURLItem, int IFlags) { try { if (IFlags == ((int)EVT_SINK_FLAGS.EVT_SYNC_COMMITTED + (int)EVT_SINK_FLAGS.EVT_IS_DELIVERED)) {

ProcessMessage(pEventInfo, bstrURLItem, IFlags);

}

catch (Exception ex) {

log.Debug(ex.Message + " " + ex.StackTrace);

}

finally {

LogManager.Shutdown();

} }

For Exchange handlers debugging - it is the extremely convenient to use system log4net in RollingLogFileAppender or RemoteAppender modes (for multiple instance of COM + objects). You can read more on this subject here http://logging.apache.org/log4net/ To allow the handler incoming mail removal, it is necessary to give proper rights to the user, under which account the COM+ application runs the handler. These are rights on change of the information in user's boxes for whom it is registered (Windows 2003 Server: Active Directory Users and Computer -> Users -> Properties (for COM+ application account) -> Exchange Advanced -> Mailbox Rights). And now the code:

private void DeleteMessage(string bstrURLItem) { try {

ADODB.Connection oCn = new ADODB.Connection();

oCn.Provider = "exoledb.datasource";

oCn.Open(bstrURLItem, "", "", -1);

if(oCn.State == 1) {

log.Debug("Good Connection");

}

else {

log.Debug("Bad Connection");

}

ADODB.Record rec = new ADODB.Record();

rec.Open(bstrURLItem, oCn,

ADODB.ConnectModeEnum.adModeReadWrite,

ADODB.RecordCreateOptionsEnum.adFailIfNotExi sts,

ADODB.RecordOpenOptionsEnum.adOpenSource,

"", "");

rec.DeleteRecord(bstrURLItem, false);

rec.Close();

oCn.Close();

rec = null;

oCn = null;

}

catch (Exception ex) {

log.Debug(ex.Message + " " + ex.StackTrace);

} }

Happy customizing! Boris Makushkin

Boris Makushkin is Software Engineer in Alba Spectrum Technologies ? USA nationwide Microsoft CRM, Microsoft Great Plains customization company, based in Chicago, Boston, San Francisco, San Diego, Los Angeles, Houston, Atlanta, New York, and Miami and having locations in multiple states and internationally (http://www.codeproject.com/csharp/csmanagedeventsinkshooks.asp), he is Dexterity, SQL, VB/C#.Net, Crystal Reports and Microsoft CRM SDK developer.

housekeepers near Buffalo Grove ..

In The News:

Analysts at Silent Push have uncovered a widespread scam that uses counterfeit retail websites to steal the credit card information of online shoppers.

Chrome users need to update their browsers immediately as Google addresses a critical vulnerability that hackers are actively exploiting. Additional security measures are recommended.

A study found teens glance at phones for dangerous two-second intervals while driving, using devices primarily for entertainment, texting and navigation despite crash risks.

Security researchers uncovered a flaw in Windows 11 that allows attackers to disable Secure Boot using Microsoft-signed tools, requiring manual updates to protect against bootkits.

Carnegie Mellon's noninvasive brain technology allows users to move robotic fingers by thinking about the motion, offering new possibilities for people with motor impairments.

Multi-factor authentication (MFA) adds an extra layer of protection to your accounts. Instead of relying only on a password, MFA requires you to verify your identity using two or more methods.

Scientists from Duke, Harvard, and the University of Otago have unveiled a game-changing tool called DunedinPACNI. It uses a single AI brain scan to reveal how fast a person is biologically aging.

A disturbing wave of fake agent phone scams is sweeping across the United States, catching people off guard and draining their savings.

Emojis aren't just playful add-ons; they're powerful tools for building stronger connections in our increasingly digital world.

Google has taken a major step toward the future of clean energy by partnering with Commonwealth Fusion Systems (CFS), an MIT spin-out working to build one of the world’s first commercial fusion reactors.

If you create and share art online, you might have seen messages warning that Facebook's parent company, Meta, claims the right to use or even sell anything you post, whether it's pictures, poems, or artwork.

Cybercriminals hit Qantas in a major data breach that exposed information from up to six million customers.

Having reliable, loud, and timely emergency alerts on your phone or device is important because when severe weather strikes, every second counts.

Here's how your daily brew is becoming the foundation for greener buildings.

Artificial intelligence (AI) and large language models (LLMs), such as ChatGPT, are transforming how we learn. But what does this mean for AI and learning retention?

Modern AI data centers use much more electricity than traditional cloud servers. In many cases, the existing power grid cannot keep up. One innovative solution is gaining traction: repurposed EV batteries for AI data centers.

Microsoft 365 and Outlook users are being targeted by a tactic that injects fake billing alerts directly into their calendars.

Researchers are now showing us that old smartphones as data centers could be the next big thing in sustainable tech.

Scientists have created micro-robots for sinus infection treatment that can enter the nasal cavity, eliminate bacteria directly at the source, and exit without harming surrounding tissue.

Let's examine how your data is collected in everyday life, who is buying and selling it, what happens to it afterward, and, most importantly, what you can do to protect yourself.

Researchers at the University of Sheffield in the U.K. developed small robots called "Pipebots" that can travel inside water pipes to find and potentially repair leaks, all without any excavation.

A groundbreaking new study has uncovered disturbing AI blackmail behavior that many people are unaware of yet.

Four teams of autonomous humanoid robots competed in China's first AI soccer tournament, demonstrating advanced capabilities in ball detection and independent decision-making.

The ID. Buzz autonomous van features self-driving technology with 13 cameras, nine LiDAR units and five radars after Volkswagen partnered with Hamburg and Uber for 2026 deployments.

Social Security phishing scams use urgency and impersonation to steal personal data. Learn how to spot fake SSA emails and implement 10 protective measures.