South Quay Plaza
183 Marsh Wall
I have been directed to contact you by my boss, Mr Terry Gilliam, British citizen and Principal Assurance Manager for the HSBC in London. He has an urgent business proposal for your consideration and acceptance that he wishes to discuss with you.
Kindly indicate your interest and get back to enable him furnish you with more information/details and modalities on this proposal via his private email address: email@example.com
Oh, there's got to be a reference to a Monty Python skit that fits here.....(I also like how the spam is simply signed "Secretary." So s/he doesn't get to have a name?)