Some 300,000 emails were released “in response to the government’s post-coup purges.”
The WikiLeaks founder is wanted by Swedish authorities for questioning over allegations, which he denies, that he committed rape in 2010.
A letter from Greek prime minister Alexis Tsipras questions whether the country "can trust" the lender.
Julian Assange has been holed up in the Ecuadorian embassy in London since 2012.
Assange, 44, is wanted in Sweden for questioning over allegations of rape in 2010, which he denies.
Assange took refuge in the Ecuadorian embassy in 2012 to avoid extradition to Sweden, where he is wanted for questioning over allegations of sexual assault.