We use “CDONTS’ to send mail out in an ASP application and we use MS Outlook as well. This asp application will sends out some different email notifications at certain situations. Some were ok, but some type of email notification were sending duplicate emails sometimes. When it happened, the two duplicated mails were sent very close, within 0.5 second (with different message id). It did not depend on the email addresses of both sender and receiver, sometime it’s getting better and sometimes it’s getting worse. We do not know when it happened as well. It just likes a virus… Also I have not heard other application have the same problem in my company.

I have look into the code and tried my best to find any possible loop or any logical problems that may confuse the system, but I could not. Also I had set a counter -- it would increate by one if it sent duplicate mails. But the counter had never been increased when the duplicated mail happened. I had checked if the system pulled out duplicate email addresses from the database table as well. It showed me that it did not…

I have a Network engineer checked MS Exchange (service pack 1). He could not find the problem. I have a system admin to check SMTP as well. But he did not have any luck.

Please let me know if you have the similar experience. I really appreciate if you could provide me any suggestions. Thanks.

 We have had auto generated email in an asp application working just perfectly for over a year. Suddenly last week the auto emails started going out twice. When I log on as a prod user a distribution list is used the same one that has been used for years and the emails go out twice. When I log on as a test user our code hard codes my email address and the email goes out once. We have checked and rechecked the distribution list. If I go into outlook and send to the distribution list it only goes out once.

I have seen a couple of post on this in google so far. If any one has a fix, please share it.

Did u people get any solution.which u were posted.
if u get any solution .please let me know
my mail id is [email protected]