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Editorial Team
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Asked: 2026-06-07T15:06:00+00:00

I am working on a e-commerce website and there is an issue which we

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I am working on a e-commerce website and there is an issue which we are trying to solve.
After customer completed order she is receiving three emails (all of them same) instead of one.
The website is running on three servers and we think that’s the problem because using only one server brings one email delivered to the customer.
I would like to know what we should do so the user will receive only one email instead of three and we will still run the website on three servers.
Thanks in advance, Laziale

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  1. Editorial Team

    You cannot count on locking hints in the database for this. A hint is just a hint; there’s no guarantee that the locking will happen as you expect (assuming this is SQL Server). In general, a relational database is just that, a database. A table is not a queuing mechanism and you will always have problems if you try to use it that way.

    Nonetheless, in order to implement a different solution, we have to determine if a single record is being added to the “queue” or if three records are being added. If it is the first, and only a single record is added but three emails are sent out then the solution is simple. Instead of using a database table as your queue, use Microsoft Message Queues (MSMQ) instead. They are part of Windows Server and have been since at least 2003, maybe even all the way back to 2000. They will provide you with an actual queue specifically designed for what you’re trying to accomplish.

    If there are three actual records being added to the “queue” table in the database that means there is a code problem. Even with three Web servers in the load balancer, the fact remains that a single order submission only happens on one of those servers. The business logic that places the email notification in the queue could not come from more than one server because the request only originates from one server.

    I would check the table first and determine if there are multiple records being added. If not, change the implementation to use MSMQ. If so, check your code to see why more than one record is being added in the request.

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