Talking to the media here, Venkat said the mail was addressed to Ganguly's maternal uncle Sanjay Chatterjee, with whom he is in regular contact through mails.
Besides if there was any doubt about the authenticity of the mail, his elder brother Snehashis Ganguly would not have handed it to the public.
''Do you think Snehashis would do a thing like that?,'' he asked.
He said there was no singing off from Sourav as the mail-id was the authentication mark.
Questions had been raised about the authenticity of the mail as it was not addressed to his elder brother and there were grammatical errors that was not expected from a well educated person like Sourav Ganguly.