Sandra Muller, a French journalist, launched the hashtag #balancetonporc (the French version of #MeToo) to describe TV executive Eric Brion.
In September 2019 she was ordered to pay 15,000 euros in damages to Brion, whom she had accused on Twitter of making sexually lewd remarks at a party.
The trial court ruled she had provided no proof of her claims of sexual harassment.
Brion had admitted to making inappropriate remarks but claimed he had later apologised in a text message. His lawyers argued that the remarks did not constitute harassment which under French law must involve repeated or "serious" pressure.
France: Sandra Muller, who founded French version of #MeToo, wins appeal against defamation ruling - @LettreAudio https://t.co/alSMGICaTj
— Melissa Chemam (@melissachemam) March 31, 2021
But the Paris Court of Appeal overturned that verdict on Wednesday, ruling that "even if Eric Brion suffered by being the first man denounced under #balancetonporc, Sandra Muller should be recognised as having acted in good faith."
A 'historic victory' for all victims of sexual harassment
Muller's lawyer Jade Dousselin hailed the verdict as a "historic" win for victims of sexual harassment and a "huge relief" for her client.
"The appeals court is saying to the victims, to all those who spoke out, to all those who spoke the truth, that those people will not be convicted," Dousselin said.
La dream team ! Merci à mes avocats bien évidemment @JadeDousselin @fszpiner ( pardon les dames d’abord ) et @francoisbaroin pic.twitter.com/gmW2XHOguj
— Sandra Muller (@LettreAudio) March 31, 2021
Muller made the claim against Brion on 13 October 2017, at the height of the #MeToo movement, which began in the US following the rape and abuse allegations against film mogul Harvey Weinstein.
Muller launched the hashtag #balancetonporc as a call for French women to name and shame abusers and then shared her own account in a later tweet.
She accused Brion of humiliating her at a function in the southern French city of Cannes in 2012, telling her: "You have big breasts. You are my type of woman. I will make you orgasm all night."
She ended the post with the hashtag #balancetonporc.
'Ugly', 'inappropriate' but 'not harassment'
Brion, the former head of TV channel Equidia, acknowledged making inappropriate remarks but said he had apologised by text message the day after.
But he argued that Muller's post wrongly portrayed him as a sex offender and that the publicity around the incident had ruined his career.
"It was a heavy come-on, it was ugly but that does not mean he deserves to be pilloried with the title of workplace sex harasser," his lawyer Nicolas Benoit had argued.
Muller, who denies having received an apology from Brion at the time, slammed her initial conviction as sending a message that women should "shut up" about sexual harassment and abuse.
She also revealed that her own career had suffered from being associated with #balancetonporc but said she had no regrets about speaking out.
