You haven't binmode'd your socket, so I wonder how this works under Unix, and on Windows instead of sending \n you'll send \r\n to the socket.

For better debugging, consider printing the server answer in $_.

Have you considered simply using MIME::Lite instead? It works on Windows and systems with sendmail available and has been tested.

In reply to Re: Socket SMTP email inappropriate i/o control operation by Corion
in thread Socket SMTP email inappropriate i/o control operation by $h4X4_|=73}{

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