What about quietly forwarding the email to the legit tech support mailbox for Toyota, if such a thing exists? Are there problems with that approach (other than the tech support people replying to you instead of their customer).
As he said in the comments, if they couldn't find a support email, why would he be able to? The issue is not Toyota-specific, there are tons of different cars shipping curl; is he supposed to become some sort of customer-support switchboard?
If there's a limited amount of car companies, why not just compile one email with a big list of contact numbers, and use that reply template whenever you get such an email.
I suppose you could even send it out automatically based on filter conditions?
People seeking technical support often resist redirection once they've been assured, through direct contact, that they have the attention of someone knowledgeable.
To put it plainly: your solution doesn't work. Our team was responsible for the tech support for a very generically named Usenet service. Very often, people looking for the .com version of our .net service would email us continually looking for a resolution to something or other. No amount of explanations deterred them and we often had to stop responding.
And then those numbers change, and how are you gonna know? Do you periodically call them all? Do you wait for people to get mad at you because the number has changed, before you spend more time figuring out what the number is supposed to be today? And what if you don't even know all manufacturers from Asia or Brazil? And what if people complain that they want the number for their own language or country? That list gets very long very quickly.
But above all, why should he care? He's a developer, doesn't get a dime from such carmakers, why should it be his problem?
