SMTP Authorization code for PHP Mail Form

Question

Can anyone help me in figuring out the correct way to incorporate the SMTP authentication into a form? I am having a lot of trouble in getting my forms to send with this format. My code for my php action page is below. I have my correct information where i included *******. Please let me know what i have wrong.
CODE STARTS HERE
<?php
//new function
$to = "*******";
$nameto = "LTL Freight Shop";
$from = "*******";
$namefrom = "LTL Freight Shop";
$subject = "Account Request";
authSendEmail($from, $namefrom, $to, $nameto, $subject, $message);
?>
<?php
$recipient  = "*******";
//$subject = "Account Request";
$companyname = check_input($_POST['CompanyName'], "Enter your company name");
$firstname  = check_input($_POST['FirstName'], "Enter your first name");
$lastname  = check_input($_POST['LastName'], "Enter your last name");
$phone  = check_input($_POST['PhoneNumber'], "Enter your phone number");
$fax  = check_input($_POST['FaxNumber']);
$email  = check_input($_POST['Email'], "Enter your email");
$address  = check_input($_POST['StreetAddress'], "Enter your address");
$city  = check_input($_POST['City'], "Enter your city");
$state  = check_input($_POST['State'], "Enter your state");
$zipcode  = check_input($_POST['ZipCode'], "Enter your zip code");
$country  = check_input($_POST['Country'], "Enter your country");
$yearsinbusiness  = check_input($_POST['YearsinBusiness'], "Enter your years in business");
$typeofindustry  = check_input($_POST['TypeofIndustry'], "Enter your type of industry");
$multiplelocations    = check_input($_POST['MultipleLocations']);
$numberoflocations  = check_input($_POST['LocationsCount']);
$ltl  = check_input($_POST['ServicesLTL']);
$ftl  = check_input($_POST['ServicesFTL']);
$domesticparcel  = check_input($_POST['ServicesDomesticParcel']);
$intlparcel  = check_input($_POST['ServicesInternationalParcel']);
$airfreight  = check_input($_POST['ServicesAirFreight']);
$oceanfreight  = check_input($_POST['ServicesOceanFreight']);
$other  = check_input($_POST['ServicesOther']);
$none  = check_input($_POST['ServicesNone']);
$volume  = check_input($_POST['TypicalVolume'], "Enter your typical volume");
$carrier  = check_input($_POST['CurrentCarrier'], "Enter your current carrier");
$class  = check_input($_POST['AverageClass'], "Enter your average class");
$weight  = check_input($_POST['AverageWeight'], "Enter your average weight");
$process   = check_input($_POST['Process']);
$hearabout = check_input($_POST['HearAbout']);
$comments = check_input($_POST['Comments']);
if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/", $email))
    show_error("E-mail address not valid");
$message = "You have received an account request from:
Company Name: $companyname
First Name: $firstname
Last Name: $lastname
Phone Number: $phone
Fax Number: $fax
E-mail: $email
Street Address: $address
City: $city
State: $state
Zip Code: $zipcode
Country: $country
Years in Business: $yearsinbusiness
Type of Industry: $typeofindustry
Multiple Locations: $multiplelocations
Number of Locations: $numberoflocations
Services they use: $ltl, $ftl, $domesticparcel, $intlparcel, $airfreight, $oceanfreight, $other, $none
Typical Volume: $volume
Current Carrier: $carrier
Average Class: $class
Average Weight: $weight
How they currently process: $process
How they heard about us: $hearabout
Comments: $comments
End of message
//ini_set("SMTP","smtp.emailsrvr.com");
//ini_set("SMTP_PORT", 25);
//ini_set("sendmail_from","*******");
//mail($recipient, $subject, $message);
function check_input($data, $problem='')
    $data = trim($data);
    $data = stripslashes($data);
    $data = htmlspecialchars($data);
    if ($problem && strlen($data) == 0)
        show_error($problem);
    return $data;
function authSendEmail($from, $namefrom, $to, $nameto, $subject, $message)
$smtpServer = "smtp.emailsrvr.com";
$port = "25";
$timeout = "30";
$username = "********";
$password = "********";
$localhost = "smtp.emailsrvr.com";
$newLine = "\r\n";
$smtpConnect = fsockopen($smtpServer, $port, $errno, $errstr, $timeout);
$smtpResponse = fgets($smtpConnect, 515);
if(empty($smtpConnect))
$output = "Failed to connect: $smtpResponse";
return $output;
else
$logArray['connection'] = "Connected: $smtpResponse";
fputs($smtpConnect,"AUTH LOGIN" . $newLine);
$smtpResponse = fgets($smtpConnect, 515);
$logArray['authrequest'] = "$smtpResponse";
fputs($smtpConnect, base64_encode($username) . $newLine);
$smtpResponse = fgets($smtpConnect, 515);
$logArray['authusername'] = "$smtpResponse";
fputs($smtpConnect, base64_encode($password) . $newLine);
$smtpResponse = fgets($smtpConnect, 515);
$logArray['authpassword'] = "$smtpResponse";
fputs($smtpConnect, "HELO $localhost" . $newLine);
$smtpResponse = fgets($smtpConnect, 515);
$logArray['heloresponse'] = "$smtpResponse";
fputs($smtpConnect, "MAIL FROM: $from" . $newLine);
$smtpResponse = fgets($smtpConnect, 515);
$logArray['mailfromresponse'] = "$smtpResponse";
fputs($smtpConnect, "RCPT TO: $to" . $newLine);
$smtpResponse = fgets($smtpConnect, 515);
$logArray['mailtoresponse'] = "$smtpResponse";
fputs($smtpConnect, "DATA" . $newLine);
$smtpResponse = fgets($smtpConnect, 515);
$logArray['data1response'] = "$smtpResponse";
$headers = "MIME-Version: 1.0" . $newLine;
$headers .= "Content-type: text/html; charset=iso-8859-1" . $newLine;
$headers .= "To: $nameto <$to>" . $newLine;
$headers .= "From: $namefrom <$from>" . $newLine;
fputs($smtpConnect, "To: $to\nFrom: $from\nSubject: $subject\n$headers\n\n$message\n.\n");
$smtpResponse = fgets($smtpConnect, 515);
$logArray['data2response'] = "$smtpResponse";
fputs($smtpConnect,"QUIT" . $newLine);
$smtpResponse = fgets($smtpConnect, 515);
$logArray['quitresponse'] = "$smtpResponse";
function show_error($myError)
?>
    <html>
    <body>
    <b>Please correct the following error:</b><br />
    <?php echo $myError; ?>
    </body>
    </html>
<?php
exit();
?>

Answer 1

I have tried the standard PHP mail function and it doesnt seem to work. Here is my most recent warning or error message.
Warning: mail() [function.mail]: SMTP server response: 554 5.7.1 <*****>: Sender address rejected: Access denied in D:\inetpub\vhosts\ltlfreightshop.com\httpdocs\requestaccount.php on line 78
I had the standard mailing set up but it wouldnt ever send and when i set up just the form, it requires the default email client. Am i wrong to assume that i need the SMTP authentication?
I am not sure about the sockets being enabled. We currently outsource our web hosting and email hosting. I cannot find the phpinfo(), where would this be?
Thanks,
Ben