WSAECONNREFUSED No connection could be made because the target machine actively refused it.

One possible cause of this socket connect error is when an Anti-Virus program blocks the connection. This can happen if the AV program is blocking the outbound port. If some programs can connect to a given remote host:port, but your application cannot, then check your Anti-Virus program to see if exceptions were made for specific programs, but not for your […]

Anti-Virus Blocking Application’s SMTP Connection

Occasionally, Chilkat will receive a support email from a customer with a problem described this way: Outlook can connect to my SMTP server and send email, but my application cannot. I’ve checked the settings and they are identical to those used by Outlook. What could the problem be? The problem is often caused by an Anti-Virus program. The AV program […]