The many threads here have made it clear that many here have had unwanted email contact with stalkers. Some have had threats and harassment issues, which is a felony. While many here did not have this problem, there is an unfortunate number here who had.
BTguy suggested getting law enforcement involved. However, it's tough to know what to do with the police, and no LE contacts have been forthcoming.
(preface- this is an unpaid plug le'toeles harabim- I'm not getting commission but I probably should).
Philip Rosenthal,is a computer cybercrime expert, computer forensic analyst, and ex-cop who has many contacts with the NYPD. In addition, he has spoken in numerous yeshivas and has appeared in many Orthodox magazines. He is available to help everyone fight back at their email stalkers. He knows the system, and knows what's criminally actionable and what's not. He can also do computer forensics if you suspect criminal activity. His website is philiprosenthal.org. As always, ask your rabbi before pursuing actual criminal charges. While he charges money, you might be able to sue the stalker for restitution.
he might also be able to give you free advice without charging you.
Here is a small part of his speaking engagements:
Areivim
August 31 Memphis Community Presentation
July 8 Australia - Melbourne/Sydney Communities
June 22 Keter Tora - Deal, NJ
May 24 Bais Yaakov d'Reb Meir
May 17 Beth Jacob Boro Park
May 10 Bais Yaakov - Cleveland, OH
May 6 Torah u'Mesorah Convention
May 4 Bais Yaakov Adas Yereim - Wein
April 29 Sacred Lives
April 22 Ezer NW - London
March 3 Toronto
March 2 Bais Yaakov Toronto
February 24 Bais Rivka - Crown Heights



