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Federally, more than 170 addresses associated with the Canadian Armed Forces are on the list, and hundreds more from other departments and agencies, including justice, public works, the Canada Revenue Agency and the RCMP.

At least one MP was registered by name. Several email addresses attached to the Senate were registered although not under any sitting senators’ names.

According to data on AshleyMadison.com, there were more than 55,000 users on the website living in Ottawa in 2013, making it the most infidelity-friendly city in Canada.

There were also municipal government email addresses on the list, including 78 in Toronto, 41 in Ottawa and 32 in Calgary. Dozens of university email addresses are also included.

Hackers leaked the list after claiming Ashley Madison refused to bow to their demands to close the site. A message posted online said “Time’s Up!” and accused parent company Avid Life Media of deceit and incompetence.

Computer security expert Brian Krebs, who writes the KrebsOnSecurity blog, said many of the leaked accounts appeared to be little more than a name and an email address, raising questions about their authenticity.

“But when you start factoring in payment information, that becomes harder to explain,” he said.

Krebs said Ashley Madison does not send verification emails and allows multiple accounts to be linked to a single email address in an effort to aid users’ privacy.

“They wanted to remove the ability for anybody to do that reconnaissance and try to register to find out if somebody was already a member,” he said. “They wanted their users to have deniability.”