sockError: 10053, WSAECONNABORTED An established connection was aborted by the software in your host machine

Question:

I get this error when trying to connect to the SMTP server:

ChilkatLog:
  VerifySmtpConnection:
    DllDate: Nov  5 2007
    Username: ****
    Component: .NET 1.*
    Checking connectivity to SMTP server something.something.net:25
    smtp_host: something.something.net
    smtp_port: 25
    sockError: 10053
    Connect function failed.
    SocketError: WSAECONNABORTED An established connection was aborted by the software in your host machine.
    Failed to connect (2)

Answer:

Check to see if you have an anti-virus/spyware program that’s blocking it. Sometimes those programs will allow "known" applications such as Outlook to work, but disallow others. You would need to configure the anti-virus software to allow your app to send email.