The chief of the Australian defence force personally raised concerns over tweets by the navy's most senior Muslim officer before the @navyislamic account was closed in December, internal defence emails reveal.

Capt Mona Shindy received a number of emails from the public which she described as "defaming", and for which she sought help and legal advice after becoming a public face of the defence force's diversity push.

The revelations, contained in emails obtained under freedom of information, underscore the sensitivities the defence force is navigating to reshape its culture and attract more female and ethnically diverse recruits.

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