Unlike his former boss Hillary Rodham Clinton, Mayor Bill de Blasio says he uses his government-issued email account -- not a personal account -- for official business.

But de Blasio defended Clinton, who is under fire for conducting official business while secretary of state via a private email account.

"To me, it's quite clear that measures were taken to comply with both the letter and the spirit of the law, and I respect that. Every place is different," de Blasio said Wednesday in response to a question of whether it's appropriate for public officials to exclusively use private email.

De Blasio was campaign manager for Clinton's successful 2000 U.S. Senate run.

Federal rules and Obama administration policy call for officials to conduct official business on government-issued accounts. Clinton's personal staff recently handed over to the State Department thousands of emails they say are related to government business.

"What's quite clear is that when her staff was asked to produce all the emails that did document the work she was doing, 55,000 pages of emails were produced," de Blasio said.

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Speaking at an unrelated news conference yesterday, de Blasio, Public Advocate Tish James and Council Speaker Melissa Mark-Viverito all said they use official email when required to do so.

"I certainly also use private email for private matters, or personal matters or nongovernmental matters, but for governmental, I use governmental email," de Blasio said.