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CDONTS, CDOSYS, IIS 6.0, IIS 7.0 and headaches…

I’m adding a few old things to this blog, this is pretty old! We moved from an old IIS 6.0 server setup with Classic ASP code sending bulk newsletter emails using CDONTS, to a new Windows 2008 R2 server in the cloud with IIS 7.5. We also moved to using a 3rd party SMTP service... » read more

Why is the “SendUsing” configuration value invalid for CDO.Message?

Getting CDO.Message.1 error ‘80040220’ The “SendUsing” configuration value is invalid. When sending mail? In Classic ASP and perhaps others you might run across this, it was driving me insane as it worked fine on other sites, but not on this particular one.  We were running our sites on Amazon AWS, Windows Server 2008 R2.  Solution: ... » read more