OODGEROO MP Mark Robinson says an administrative error was behind an email in which he inadvertently shared more than 400 voter email addresses.
The email was sent out on Monday and included an attachment detailing the LNP's promise of a parliamentary inquiry into a North Stradbroke Island temporary local planning instrument, announced last week.
Independent Oodgeroo candidate Claire Richardson called for Mr Robinson to apologise, saying the email was a privacy breach.
One resident said the slip-up warranted an explanation.
Mr Robinson said an unfortunate mistake had occurred when sending out the email.
"No confidential information was disclosed within the emails as they were manually collected addresses, and it was not in any way a breach (of the Privacy Act)," he said.
It came after Redland City councillor Tracey Huges apologised for mistakenly attaching a spreadsheet containing names, addresses, phone numbers and details of dealings with Redland City Council while sending an invitation to a New Year's Eve party last year.
The Stradbroke planning instrument rezones parcels of land in and around the island's three townships to facilitate residential development.
Ms Richardson said the instrument was effectively a strategic document with no specific proposals for new development.
She questioned why the LNP was pushing for an inquiry for the TLPI but not the 3600-dwelling Toondah Harbour development.
"A master plan for 3600 apartments built in a protected wetland at Cleveland simply marches through to a full (environmental impact study) with no mention of an inquiry from either side of politics, despite advice from federal government scientists that it should proceed no further," she said.
Mr Robinson said an overwhelming number of island residents and property owners had contacted his office to express concerns about the planning instrument.
"Many of these people are reluctant to speak up individually in public but it is extremely important that everyone is consulted and gets to have their say, and not just a select few," he said.