My best advice would be like others have said, get them to have a treat or maybe just get her used to and familiar neighbours. See if your neighbours wouldn't mind just one day coming over to your house or if you came over and just petting your dog, getting used to her. Then they could feed her some treats...get the hang of it? If they're not willing to do that or it's just not a good idea, try and get your dog to pay more attention to you when you step out of the house with her or train her not to bark at them. Don't punish her when she barks, just tell her to be quiet and when she stops reward her. Or if you want her to instead pay attention to you then teach her the command "watch me" and again reward. Hope some of these things will help! Good luck and keep us posted.