The unemployed need not apply.

That is the message being broadcast by many of the nation’s employers, making it even more difficult for 14 million jobless Americans to get back to work.

A recent review of job vacancy postings on popular sites like Monster.com, CareerBuilder and Craigslist revealed hundreds that said employers would consider (or at least “strongly prefer”) only people currently employed or just recently laid off.

Unemployed workers have long suspected that the gaping holes on their résumés left them less attractive to employers. But with the country in the worst jobs crisis since the Great Depression, many had hoped employers would be more forgiving.

“I feel like I am being shunned by our entire society,” said Kelly Wiedemer, 45, an information technology operations analyst who said a recruiter had told her that despite her skill set she would be a “hard sell” because she had been out of work for more than six months.