Premier Annastacia Palaszczuk has sidelined Energy Minister Mark Bailey after Queensland's corruption watchdog found a "reasonable suspicion of corrupt conduct" over his use of a personal email address.

Key points: Minister Mark Bailey used personal email address for work purposes

Minister Mark Bailey used personal email address for work purposes CCC says possible deletion of material may be corrupt

CCC says possible deletion of material may be corrupt Minister stood down; protests innocence

Mr Bailey was asked to stand down by the Premier during crisis talks on Wednesday night, and has promised to cooperate with investigators who are looking at the potential deletion of emails which are considered public records.

The Crime and Corruption Commission's findings put further pressure on the minority Palaszczuk Government in the lead-up to the next state election, which must be held before May 2018 but is tipped to occur earlier.

A CCC probe was sparked after Mr Bailey closed the mangocube6@yahoo.co.uk account when The Australian newspaper made a right to information (RTI) request to find out whether he was using the address to talk to union officials.

The CCC retrieved more than 30,000 emails from his account and considered "a number" of them to be public records.

While it did not find any evidence Mr Bailey had used his personal email account to negotiate with union officials that would amount to corrupt conduct, it did sound warnings over the potential destruction of public records.

"The CCC considers there is sufficient evidence to raise a reasonable suspicion of corrupt conduct relating to the potential destruction of public records by the Minister as this may be an offence under the Public Records Act 2002," it said in a statement.

Because CCC's jurisdiction only covers corrupt conduct as it relates to a criminal offence, it has referred the matter to the State Archivist to investigate.

The CCC also found a number of other ministers had been using private email accounts but no corrupt conduct was identified.

Mr Bailey protested his innocence on Wednesday night and said he would cooperate with the investigators.

"I don't want this to be an unnecessary distraction from the good work and achievements of the Palaszczuk Government," he said in a statement.

How email brought Bailey unstuck: January 19: The Australian newspaper makes a Right to Information (RTI) request for emails between Mark Bailey and union officials

January 19: The Australian newspaper makes a Right to Information (RTI) request for emails between Mark Bailey and union officials January 23: Premier Annastacia Palaszczuk and Mark Bailey discuss the email address at Cabinet meeting

January 23: Premier Annastacia Palaszczuk and Mark Bailey discuss the email address at Cabinet meeting February 28: RTI application rejected on grounds email address "had been closed"

February 28: RTI application rejected on grounds email address "had been closed" March 2: Mr Bailey promises to re-activate email, amid internal government and CCC investigations

March 2: Mr Bailey promises to re-activate email, amid internal government and CCC investigations March 16: CCC says it has retrieved 30,000 emails from Mr Bailey's account

March 16: CCC says it has retrieved 30,000 emails from Mr Bailey's account July 19: CCC says there is "reasonable suspicion of corrupt conduct" regarding Mr Bailey's usage of email address. The Premier stands the minister down.

"I stand by my integrity and look forward to the resolution of this investigation which I hope will be carried out as quickly as possible."

Ms Palaszczuk said the acting arrangements for Mr Bailey's ministerial portfolio responsibilities would be announced on Thursday.

Attachments missing from emails

In March, Mr Bailey told Parliament he deleted the account to ensure he could only be contacted on his ministerial email account.

He later said he was not aware of the newspaper's RTI application when he shut the account, and did not see an email from one of his staff members about the application.

Mr Bailey then promised to reactivate the account.

But in a letter from the CCC to Opposition Leader Tim Nicholls, the watchdog said some materials could not be salvaged.

"While the account was able to be reactivated it is not possible to say with absolute certainty that the content of the reactivated account is exactly identical to its content at the time of deactivation," the letter stated.

The CCC also noted that some email attachments now classified as public records were not accessible via the reactivated account, which could amount to a breach of section 13 of the Public Records Act.

Opposition calls for Bailey's sacking

Mr Nicholls said the saga brought the Government’s integrity into question.

"Annastacia Palaszczuk is all talk when it comes to accountability, openness and transparency, but it's blindingly obvious that she only acts when cornered," he said.

"This is now the fourth Labor Minister who has been found out, and who hasn't been honest with Queenslanders."

He said the CCC findings showed Mr Bailey was not fit to serve as a minister.