A widely-circulated anonymous email put fresh focus on recent allegations of misconduct toward a female colleague.
It was Hamilton's first pole position since Saudi Arabia in December 2021.
Britain's Lewis Hamilton won the Bahrain Formula One Grand Prix on Sunday after a thrilling duel with Mercedes team mate Nico Rosberg.
McLaren will start the Formula One season without a title sponsor but still expect to have one this year, group chief executive Ron Dennis said.
Max Verstappen clinched his second win of the season as the Australian Grand Prix was halted with three red flags.
Formula One will have a record 24 races in the season that starts in Bahrain on Saturday.
Red Bull closed the gap to champions Mercedes in the constructors' standings to one point.
Max Verstappen won Red Bull's home Austrian Grand Prix from pole position and with the fastest lap on Sunday for the team's 10th successive Formula One victory and ninth in nine races this season.
"There's a lot of work that still needs to be done in this sport. "I can't retire now, because I'm only just embarking on helping create a more open and inclusive environment here in this sport and I've got to stay to help that continue." said Hamilton.
Red Bull's double World champion Max Verstappen swept to pole position at the Mexico City Grand Prix on Saturday with his sights set on a record 14th victory of the season.
Sergio Perez beat teammate and championship leader Max Verstappen to win the Azerbaijan Grand Prix on Sunday and continue Red Bull's Formula One domination with a double success in Baku.
Max Verstappen put his Red Bull on pole position for the Austrian Grand Prix
Max Verstappen added his name to the list of triple Formula One World champions on Saturday after Red Bull team mate and sole title rival Sergio Perez crashed out of the Qatar Grand Prix sprint race.
Verstappen led from start to finish at Austria's Red Bull Ring, with seven-time world champion Hamilton second for Mercedes.
Charles Leclerc overcame a late throttle scare to win the Austrian Grand Prix for Ferrari on Sunday and become Formula One championship leader Max Verstappen's closest rival.
Dutch teenager Max Verstappen became Formula One's youngest race winner on Sunday in a sensational Spanish Grand Prix that saw dominant Mercedes drivers Lewis Hamilton and Nico Rosberg collide on the opening lap.
Charles Leclerc seized pole position for the Italian Formula One Grand Prix and sent Ferrari hopes soaring on Saturday while Mercedes' George Russell joined him on the front row once penalties were applied.
Hamilton wrapped up his record-equalling seventh title in Turkey last month and picked up his 11th win of the season in Bahrain on Sunday. Mercedes have already won the constructors' title for an unprecedented seventh year in a row.
Hamilton's team mate Valtteri Bottas finished third, ahead of Ferrari's Charles Leclerc, in a race aimed at providing more thrills for fans over the three days of track action and potentially shaking up the starting grid.
Verstappen hustled his Honda-powered Red Bull around the popular figure-of-eight layout in one minute, 29.304 seconds
Lewis Hamilton won a crazy, twice-halted Saudi Arabian Grand Prix for Mercedes on Sunday to go level on points with Red Bull rival Max Verstappen and set up a winner-takes-all title showdown.
Lewis Hamilton took his 98th career pole position in qualifying for the Bahrain Grand Prix on Saturday
Ferrari's Charles Leclerc secured pole position for the Singapore Grand Prix on Saturday after a furious Max Verstappen was forced to abandon his fastest lap for fear of running out of fuel.
Austin is a favourite track for the 34-year-old Mercedes driver and he will also be fancied to round up his Texan win tally to six on Sunday.
IMAGES from the Belgian F1 Grand Prix
Lewis Hamilton became Britain's first four-time Formula One world champion at the Mexican Grand Prix on Sunday.
Hamilton decided to take matters into his own hands and pass several cars ahead of him, without gaining anything as Verstappen's time stood the test.
Spaniard Carlos Sainz will make a dream move to Ferrari next year, with Australian Daniel Ricciardo replacing him at McLaren, as Formula One's driver carousel took another big twirl on Thursday with the 2020 season yet to start. Ferrari said 25-year-old Sainz, who replaces four times World champion Sebastian Vettel alongside young Monegasque Charles Leclerc at the sport's most glamorous team, had signed for 2021 and 2022.
Images from the Tuscan F1 Grand Prix held at at Mugello, Scarperia e San Piero in Tuscany, Italy, on Sunday.
Hamilton already had more race wins, pole positions and podium finishes than any other driver in the history of the sport.
An angry Leclerc dropped to fourth after Ferrari called him in again for slicks and then told him, too late, to stay out after Sainz also pitted and went directly from wets to the dry tyres.
Given how well Hamilton drove last weekend to win the Styrian GP in Austria, few would bet against the British driver securing an eighth success
Formula One got back on track in changed circumstances on Friday but with Mercedes bringing a familiar look to the timing sheets as six times World champion Lewis Hamilton led team mate Valtteri Bottas one-two in Austrian Grand Prix free practice. The Briton did 41 laps and lapped with a best time of one minute 04.816 seconds in a damp and overcast session, 0.356 faster than the Finn.
Max Verstappen took full advantage of an engine failure for Ferrari's Charles Leclerc to win the Azerbaijan Formula One Grand Prix.
Seven-times Formula One world champion Lewis Hamilton was awarded a knighthood in the UK New Year's honours list published on Wednesday.
Lauda won two world championships in 1975 and 1977 with Ferrari and a third in 1984 with McLaren. His rivalry with British driver James Hunt, the 1976 champion for McLaren, was intense and became the subject of the acclaimed 2013 film "Rush".
Lewis Hamilton has raised his game but whether the Mercedes driver can deny Ferrari a second successive win of the season in China this weekend remains to be seen.
Lewis Hamilton is on course for his most successful campaign yet and can become only the third driver after Michael Schumacher and Sebastian Vettel to win 13 times in a season.
Lewis Hamilton won the Monaco Grand Prix for Mercedes on Sunday, nursing his car's worn tyres to the finish in a nail-biting victory worthy of the team's late great Niki Lauda.
The Dutchman stopped Hamilton from winning an eighth title with a gutsy turn in the final lap.