Belliappa has sent his resignation to President Pratibha Patil on December 31, which has been accepted by Patil, the Visitor of the Central varsity with immediate effect, official sources said here today.

The fact-finding committee constituted by the Union HRD ministry to probe the charges levelled against Belliappa had found evidence that he had actually sent an email with "lewd and objectionable content" to a senior faculty member, the sources said.

The fact-finding exercise was conducted by a single-member committee of former bureaucrat M P Bezbaruah to probe allegations of misconduct against Belliappa.

Bezbaruah had submitted his report to the Union Human Resource Ministry in early December.

The associate professor had filed an FIR against Belliappa in Itanagar on April 3 last year, in which she also alleged that someone had hacked her email account and sent "objectionable" messages to Belliappa and 20 others.

Belliappa had earlier said he had received an email from the woman professor and had replied to it.

Belliapa was arrested by the Special Investigating Team of the state police following an FIR lodged by the associate professor accusing him of sending 'objectionable' email that reportedly purports to internet crime.