Security researchers have found inconsistencies in how some Simple Mail Transfer Protocol (SMTP) servers handle end-of-data sequences. This allows the injection of SMTP commands into email messages in ...

I pretty frequently get requests for help from someone who has been impersonated—or whose child has been impersonated—via email. Even when you know how to “view headers” or “view source” in your email ...

Twenty years ago, Paul Vixie published a Request for Comments on Repudiating MAIL FROM that helped spur the internet community to develop a new way of fighting spam with the Sender Policy Framework ...

I've configured our internal Exchange servers to relay outbound mail through a proxy/firewall. <BR><BR>I've noticed that the headers on external emails contain the private IPof the internal mailserver ...

When the valid SMTP connection tries to e-mail again, the server won't block valid messages because the greylist-enabled server matches the IP address, as well as information in the MAIL FROM and RCPT ...

A new SMTP header developed by Facebook and Yahoo confirms ownership of Yahoo email accounts. Yahoo’s decision in June 2013 to reset accounts that had been dormant for 12 months and make them ...