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if your contact form is opened publicly, technically everyone has the access can submit the messages. hackers can mimic the actions easily to trigger the form submission.<br />
<br />
think there have few things you can consider:<br />
<br />
* disable or limit the CORS setting (Allow-Control-Allow-Origi<wbr />n) in your web server<br />
* perhaps to prepare a &quot;black list&quot; of IP addresses that disallow to execute the asp codes. so that the hacker's IP could possibly be booked. OR similarly, you can build an IP &quot;white list&quot; as well.
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if your contact form is opened publicly, technically everyone has the access can submit the messages. hackers can mimic the actions easily to trigger the form submission.

think there have few things you can consider:

* disable or limit the CORS setting (Allow-Control-Allow-Origin) in your web server
* perhaps to prepare a "black list" of IP addresses that disallow to execute the asp codes. so that the hacker's IP could possibly be booked. OR similarly, you can build an IP "white list" as well.

dory550 lambert

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David Favor<br />
Your suggestion about &nbsp;using reCAPTCHA v3<br />
Was just what I needed<br />
Thanks<br />
Dory
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David Favor
Your suggestion about  using reCAPTCHA v3
Was just what I needed
Thanks
Dory

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Hi Guys<br />
I am using Microsoft platform / Classic ASP /cdosys<br />
I have a contact-form on my website<br />
The contact-form enables a visitor to email us a comment or a question<br />
I am using CDOSYS / classic ASP to send messages <br />
some hackers keep sending us hundreds of messages in batches &nbsp;using our contact-form with remote access<br />
What can i do to prevent this?<br />
Thanks<br />
Dory
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Hi Guys
I am using Microsoft platform / Classic ASP /cdosys
I have a contact-form on my website
The contact-form enables a visitor to email us a comment or a question
I am using CDOSYS / classic ASP to send messages 
some hackers keep sending us hundreds of messages in batches  using our contact-form with remote access
What can i do to prevent this?
Thanks
Dory

Emailing with  CDOSYS

Remote access may refer to the connection to a data-processing system from a remote location, for example through a virtual private network remote desktop software, terminal emulation, or the activation of features of a business telephone system from outside the business's premises.

Remote Access

Active Server Pages (ASP) is Microsoft’s first server-side engine for dynamic web pages. ASP’s support of the Component Object Model (COM) enables it to access and use compiled libraries such as DLLs. It has been superseded by ASP.NET, but will be supported by Internet Information Services (IIS) through at least 2022.