in doing that would you think that the secretary etc. would think it is 'junk mail' and open it themselves?
The majority of secretaries will have authority to open mail and, depending on the level of that authority, even Confidential and Strictly Confidential. The only thing that used to make me hesitate would be if the envelope was marked "Personal". If a letter was addressed Dear Sir/Madam or Dear "Job Title" (Facilities Manager, Manager, etc) and it was a 'flyer' then I wouldn't bother putting it through to the boss. However, if it was addressed to him in person then it would go through - just in case he had requested this information and forgot to tell me about it!
So, if you have the time to find out the name then, IMHO, it's got more chance of being seen by the right person. Also, even if it is intercepted by the secretary, and doesn't get through, it could always be filed away for future reference...at least that's what I used to do!

Lynn
(Mrs K)