This amount to hacking into a computer and is punishable under Section 66 of the Information Technology Act, 2000. Further, it may also amount to an offence under Section 66-C (identity theft) and under Section 66-B (dishonestly receiving stolen computer resource or communication device) of the said Act. Please note that “data” is also defined as “computer resource” in the said Act, and in your case your email details would amount to “computer resource”. You may file FIR for these and other offences, if any, with the concerned police authorities.
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