What is the correct way to greet a specific person when only their business title is known?

I need to write a letter to a specific person, who I only know by title. I do not know their name or gender.

I can think of a couple ways to greet this individual in a letter, however I can not decide which greeting is most preferable.

Should I start my letter with:

Dear Sir or Madam,

...or

Dear Manager of Standards,

...or some other greeting.

Solution 1:

I would put the title as the first line of the address.

But if I don't know their name I would always start a letter with the standard Dear Sir or Madam. (If you know their name, use Dear Mr. Smith.)

Solution 2:

I think either would be acceptable, but addressing the person by his/her title is a little more specific and evidence that you've put some thought into it. If you have any way to find out the specific name -- for example, by exploring the company's website or calling and talking to the receptionist -- it would probably earn you a few points by making your letter look less generic. Receptionists are used to answering questions like that. Good luck!