gistfile1.cs

public ActionResult UpdateProfile(ProfileInputModel input, Individual individual){
    if(!ModelState.IsValid)
        return View(new ProfileInputModel());

    Mapper.Map<ProfileInputModel, Individual>(input, individual);
    foreach(var email in input.Emails)
        individual.UpdateEmailAddress(email.Key, email.Value);

    return RedirectToAction("ViewProfile");
}

public class ProfileInputModelMapping : IAutoMapping{
    public void CreateMappings(){
        Mapper.CreateMap<ProfileInputModel, Individual>()
            .ForMember(dest=> dest.SocialSecurityNumber, opt=> opt.MapFrom(src=> src.Ssn))
            .ForMember(dest=> dest.DateOfBirth, opt=> opt.MapFrom(src=> src.Dob))
            .ForMember(dest=> dest.Emails, opt=> opt.Ignore());
    }
}

public class ProfileInputModel{
    [Required, EachValueIsAnEmailAddress]
    public Dictionary<string,string> Emails{ get; set; }

    public string Ssn{ get; set; }
    public DateTime Dob{ get; set; }
    public string FirstName{ get; set; }
    public string LastName{ get; set; }
}

public class Individual{
    public Individual(){
        _emails = new List<EmailAddress>();
    }

    private ICollection<EmailAddress> _emails;

    public IEnumerable<EmailAddress> Emails{ get; private set; }
    public string SocialSecurityNumber { get; set; }
    public DateTime DateOfBirth { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }

    public void UpdateEmailAddress(string type, string address){
        var email = _emails.SingleOrDefault(e=> e.Type == type);
        if(email == null)
            _emails.Add(new EmailAddress(type, address));
        else
            email.UpdateAddress(address);
    }
}

public class EmailAddress{
    public EmailAddress(string type, string address){
        Type = type;
        Address = address;
    }

    public string Type{ get; private set; }
    public string Address { get; private set; }

    public void UpdateAddress(string address){
        Address = address;
    }
}