Send it to some anon name like 'Dear Recruiting Person' and was lyrical about how you would like to join their 'esteemed' organisation while showing absolutely no understanding of them. Spend several pages explaining how your unrelated experience is acutually highly relevant because you have x,y,z personal skills which mean you can leap 50K in base in this sector (whatever it is) and under no circumstances demonstrate any ability to use grammar, punctuation or syntax; also remember to be obsequious to the point of begging subservience and underline that you would only be interested if the company will pay for travel and a 4 star hotel for interviews, relocation costs and any work permits you may need. Under no circumstances demonstrate any employable qualities in the cover letter.Covering letter like the ones I get bombarded with? Done.