As a job seeker, your email signature should include your full name, phone number and LinkedIn profile URL. Including your LinkedIn profile allows you to share your background in each and every email, without the presumption of attaching a resume that people haven't asked for or that might carry a bug.
Full name, phone number and LinkedIn profile URL is enough. Even if you're currently working, your personal email signature shouldn't include your current job title because this is your personal, not professional, signature.
If you have a website - you're a creative with samples to showcase or an entrepreneur with a company website - include that URL, instead of or in addition to your LinkedIn profile URL.
Following the above recommendations, the basic email signature would look like this: Caroline Ceniza-Levine, 123-456-7890, LinkedIn profile. As an entrepreneur, I do have a website and actually use that instead of my LinkedIn profile URL.
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