In today’s tight job market, recruiters are out in force, trying to entice workers with a new opportunity.

If you’re thinking: "That happens to other people, recruiters aren’t looking for me!" then maybe you should read your email more carefully.

A survey of 740 recruiters found email was the most common way they tried to contact a candidate, but they received a response only 40 percent of the time.

The survey, conducted by Entelo, a talent acquisition software company, found LinkedIn InMail was the second most popular contact method, followed by phone or text.

Recruiters aren’t typically aiming to fill lower-level positions, notes Scott Jones of Entelo.  For these posts, employers tend to rely on "inbound" recruiting, meaning they post job ads and wait for applicants to response.

Still, many mid-level and above positions are source with "passive" candidates, meaning that recruiters hunt down current workers who aren’t actively seeking a job, explains Jones.

"Anyone on the market for a new position should be checking their email first thing in the morning, again at lunch, and at the end of the day," says Erica Baldacchino of staffing firm WinterWyman.

Determined recruiters "will use any channel available to reach a great candidate," Jones says. If email isn’t returned, or "they don’t have access to an email address, they may choose to engage through a social media or professional networking site," he adds.

"LinkedIn is the heavy hitter when it comes to social media sites for recruiting," says Jim Conti of software firm Sprout Social. "Twitter and Facebook play a role as well," he adds, especially when companies "encourage employees to help with recruiting by sharing job posts with their personal networks."

Concludes Jones: "Candidates interested in exploring alternative employment should keep all channels open and regularly engage in those channels."