Server :: Send Mail Through Script?

I have written a shell script to take backup and by doubt is after tat i need a script tat it should send mail automatically to eg:user@domain.com tat 'the backup job has done successfull',after tat i need anyone help to write a shell program tat mail should send automatically after the backup job completed for the below program.

#!/bin/bash
mount -t cifs -o user="$1",password="$2" "$3"/"$1" "$4"
echo "Mounted Successfully">>/var/log/kannan

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