As I mentioned, last Saturday, I met Andy Leong, whose title is unknown. Monday, he SMS me, saying he sent me a document. I checked my mail, no mail. I SMS back, and asked what he used. Turns out to be Hotmail. Well, tough luck. I've filtered out Hotmail addresses, since Hotmail addresses typically generates junk.
So, he claimed he can't send mail from his company as there's something wrong with the server.
When finally I received email from him on late Tuesday evening, around 23:22, it turned out that the domain name was just registered on Monday afternoon. I then checked up the company on ACRA. Turns out that the registration reads 200302xxxX. So, that looks like the company was either registered in 2003, or recently.
I'm not going to be collaborating with some fly-by-night company.