SMTP: The service could not bind instance 1. The data is the error code.

I was helping a client server as mentioned the email form could send an email.

The server ran with IIS 7.5 with IIS SMTP services. Hence, I was trying to open the IIS 6.0 and start the SMTP services when found it is stopped.


However, when I trying to start the IIS SMTP services, it is prompt an alert.

At the same time, the event viewer is showing the error as below.

Event ID: 115
Source: SMTPSVC
Description: The service could not bind instance 1.
The data is the error code.

With the above error, it might meant that the SMTP port of 25 is being assigned to your email software installed to the server. To overcome the problem, refer to the step as below.

1. Open the IIS 6.0.
2. Double click the hostname and right click the Default SMTP Virtual Server then click on Properties.
3. Click on the Advance button and change the TCP port to 2525.

Well done, you have done.

Published by

Mick Genie

Mick Genie is the founder of MickGenie.com and working at ExaBytes Network Sdn Bhd and WPWebHost web host company. He is expertise in Windows and Linux environment especially web hosting related information, tips and trick as well as the IT Information.

10 thoughts on “SMTP: The service could not bind instance 1. The data is the error code.”

  1. Thanks so much for this blog post – I spend hours trying to figure the dang thing out – and it was so simple. You saved me many more wasted hours – thanks!

  2. I changed the IP of my server and just needed to assign the new IP to IIS and the SMTP service. It was trying to bind to an address that did not exist and gave this error. Hope that helps someone.

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