function mailTrue(mailType:String):Boolean {
    var t:String = mailType;
    var tmpArray:Array = t.split("@");
    if (tmpArray.length != 2) {
        trace("ARRAY NON VALIDO");
        return;
    }
    trace("continuo a STEP 1");
    var tLen:Number = tmpArray[1].length;
    var tmpChar = tmpArray[1];
    var tmpCharZero = tmpArray[0].length
    if (tLen<2 || tmpCharZero<2) {
        return;
    }
    trace("continuo a STEP 2");
    for (var i:Number = tLen; i>0; i--) {
        if (tmpChar.charAt(i) == ".") {
            trace("TROVATO DOT");
            newPoint = i;
            afterDot = tmpChar.substr(newPoint, tLen);
            (afterDot.length>=2) ? (myValue=true) : (myValue=false);
            trace("continuo a STEP 3");
            break;
        }
    }
    return myValue;
}

check Mail [F8/ AS2]

email

ActionScript