Please find a sample POP3 application with activity logging functionality included: WinFormPOP3ActiivtyLogging.zip (249.9 KB)
By test credentials we meant that if your server is accessible over internet, please create a test account on it and share its host address, port, username and password with us so that we can access it from our end and test it for reproducing the issue. This will help us investigate the issue for assisting you further.
Also, please make sure that the respective port is opened at your server end. You can verify this by configuring the account in Outlook and check if it works or not. We tested the API by specifying TLS 1.2 on Gmail account and it works using the following statement at the start of code:
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
Regarding the Paid support, please post your inquiry in Aspose.Purchase forum to get further information.
Following addition information may help us further to assist you.
- version of framework
- version of server
- version of.NET on the client side
- demonstration application which gets error on his side