> On Mar 6, 2026, at 9:13 AM, Short, William J. <[email protected]> wrote:
> 
> Sorry for the delay in response.
> 
> I created a new VM with Server 2025.
> 
> I didn't exactly recreate current environment because I didn't want to 
> install versions with known vulnerabilities.  I got it as close as I could.  
> I am still having the same problem with sending email notifications.  Here is 
> my current setup:
Your rebuild has not included the same version of some jar (or jvm) with which 
the application was compiled. Hence the NoClassDef error. 

Given that it’s “com/sun/mail” I suspect you will need the original (sun) jvm. 

But it would be better to recompile the app with new java. And likely a new 
mail making provider
> 


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