There is a handy little tool that comes with Putty called
pscp.exe that will do this and can be called in powershell easily.
Example below copies from windows to a CentOS box (logging in as the usercode "bill") and you use the
-pw switch in
pscp to pass in a password (otherwise the command window that is spawned will prompt for the Linux password):
Start-Process 'C:\Program Files (x86)\PuTTY\pscp.exe' -ArgumentList ("-scp -pw password C:\Document.rtf email@example.com:/home/bill/")
PuTTY Secure Copy client Release 0.62 Usage: pscp [options] [user@]host:source target pscp [options] source [source...] [user@]host:target pscp [options] -ls [user@]host:filespec Options: -V print version information and exit -pgpfp print PGP key fingerprints and exit -p preserve file attributes -q quiet, don't show statistics -r copy directories recursively -v show verbose messages -load sessname Load settings from saved session -P port connect to specified port -l user connect with specified username -pw passw login with specified password -1 -2 force use of particular SSH protocol version -4 -6 force use of IPv4 or IPv6 -C enable compression -i key private key file for authentication -noagent disable use of Pageant -agent enable use of Pageant -batch disable all interactive prompts -unsafe allow server-side wildcards (DANGEROUS) -sftp force use of SFTP protocol -scp force use of SCP protocol