It's definitely a scam. You can tell by the way it's written, but also because it's very unlikely a reputable publisher would contact an author like this. A lot of scammers will reach out to authors through comments, DMs, and any e-mail addresses they've listed on their profile. For example, I get a lot of e-mails and DMs from places like NovelCat, InsNovel, NovelNow, all the novel sites, lol.
Definitely research anyone who reaches out to you like this.