Nearly 20,000 emails from the inbox of Ashley Madison's chief executive Noel Biderman has been released by hackers along with the other stolen data.
The email details are now being examined by security experts and journalists, according to a BBC news report.
The report further states that US security firm TrustedSec has claimed that 30 gigabytes of stolen data includes 6,800 unique senders and 3,600 unique recipients.
The release of files by the hackers came a month after the data was stolen by hackers identified as the "Impact Team," who said they were trying to shut down the site for cheaters.
Ashley Madison is known for its slogan "Life is short. Have an affair."
It helps connect people seeking to have extramarital relationships and is owned by Toronto-based Avid Life Media (ALM).
(With Agency Inputs)