Uploading attachments larger than 10000KB fails through web mail.
HTTP runtime size limit restriction within the web.config file.
Navigate to the following location where you installed the software to:
Locate the file "web.config" and open it up in Notepad. Locate the following line in the file:
<httpRuntime maxRequestLength="10240" executionTimeout="3600" />
The value that needs to be changed is: httpRuntime maxRequestLength="10240".
If changing the value within the MailEnable "web.config" file does not resolve the uploading failure, then the next step would be to inspect the following Microsoft Knowledge Base article that explains how to edit the maxAllowedContentLength property in the ApplicationHost.config file:
|Product:||MailEnable (ME-2.X Pro-2.X Ent-2.X)|
|Keywords:||attachment upload .aspx large attachments fails size|
|Class:||TRB: Troubleshooting (Configuration or Environment)|
|Revised:||Wednesday, May 4, 2016|