pstsdk-sandbox

namespace Sandbox
{
    using System;
    using System.IO;

    using pstsdk.layer.pst;

    class Program
    {
        static void Main(string[] args)
        {
            const string dir = @"D:\data\";
            foreach (var file in Directory.EnumerateFiles(dir))
            {
                using (var pst = new Pst(file))
                {
                    foreach (var msg in pst.Messages)
                    {
                        using (msg)
                        {
                            foreach (var recip in msg.Recipients)
                            {
                                if (recip.HasEmailAddress)
                                {
                                    Console.WriteLine(recip.EmailAddress);
                                }
                            }
                        }
                    }
                }
                GC.Collect();
            }

            Console.ReadKey(true);
        }
    }
}