College graduates: when do you stop calling people Mr. and Ms.?

I graduated and am now, it seems, I am a professional freelance writer.

So when do I stop presuming to address editors with titles, Mr., Mrs. and the like?

I’ve had the conversation with friends and colleagues, and no one seems to have much of a real answer.

Some say using a title in an e-mail suggests I’m young and inexperiened. Others say just the opposite, that the formality gives a sense of greater age.

For now, I’ve stuck with using titles until an editor tells me otherwise; unless, I’m sending something the way of a publication with a decidedly more informal setting, most blogs, alternative weeklies and the like.

If you figure out a better rule or the absolutely exact moment I should drop the titles and go with first names, let me know.