正则表达式匹配除锚标记1以外的所有电子邮件

const regex = /(?:(<a[^>]*>(?:[^<]+)<\/a>))|((?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\]))|([\s\S])/gm;
const str = `example@gmail.com
example@gmail.com
For more information example@gmail.com about I Can Read, 
example@gmail.com please refer to <a href="mailto:do-not@example.com">do-not@example.com</a>our website example@gmail.com
example@gmail.com
 example@gmail.com
    example@gmail.com
	 example@gmail.com
	 
	 sdfsdf example@gmail.com
example@gmail.com sdfsdfsdf`;
let m;

let acc = '';
while ((m = regex.exec(str)) !== null) {
    if (typeof(m[1])!='undefined') {
        //First group is defined: it will have a <a> tag
        //So we just add it to the acumulator as-is.
        acc += m[1];
    }
    else if (typeof(m[2])!='undefined') {
        //Second group is defined: it will have an email
        //we change it
        acc += '<a href="mailto:' + m[2] + '">' + m[2] + '</a>';
    }
    else {
        //Any other character. We just add to the accumulator
        acc += m[3];
    }
}
console.log(acc);