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We have been using the following script (based on the book script) to deliver a booking form very successfully for some time. However, just recently occasionally a customer submits a form that is not delivered, despite them coming to the "thank you" confirmation. We do not receive the form, does not go to spam, etc. Despite repeated attempts, these customers cannot send the form successfully, while we receive many other forms without problems. Is there anything in the code that would allow the customer to get through to the "confirmation" part while the "send" is not executed successfully? Or could the only explanation be a problem in the delivery chain rather than our implementation of the form? Any advice would be appreciated, thank you. Our script is: <?php # Script 12.1 - email.php #2 // Check for form submission: if (isset($_POST['submitted'])) { /* The function takes one argument: a string. * The function returns a clean version of the string. * The clean version may be either an empty string or * just the removal of all newline characters. */ function spam_scrubber($value) { // List of very bad values: $very_bad = array('to:', 'cc:', 'bcc:', 'content-type:', 'mime-version:', 'multipart-mixed:', 'content-transfer-encoding:', '#'); // If any of the very bad strings are in // the submitted value, return an empty string: foreach ($very_bad as $v) { if (stripos($value, $v) !== false) return ''; } // Replace any newline characters or link code characters with spaces: $value = str_replace(array( "\r", "\n", "%0a", "%0d", "http://", "www.", "<a", "</a>"), ' ', $value); // Return the value: return trim($value); } // End of spam_scrubber() function. // Clean the form data: $scrubbed = array_map('spam_scrubber', $_POST); // Minimal form validation: if (!empty($scrubbed['accept_conditions'])) { // Create the body: $body = 'Sent At ' . date("H:i:s") . ' on ' . date("d/m/Y") . "\n\nSent By {$scrubbed['contact_name']} {$scrubbed['email']}\n\n-----------------\n\nEXPERIENCE 1\n\nExperience Name: {$scrubbed['experience_name']}\n\nStart Date: {$scrubbed['experience_start']}\n\nEnd Date: {$scrubbed['experience_end']}\n\n\n\nEXPERIENCE 2\n\nExperience Name 2: {$scrubbed['experience_name_2']}\n\nStart Date 2: {$scrubbed['experience_start_2']}\n\nEnd Date 2: {$scrubbed['experience_end_2']}\n\n\n\nPERSONAL DETAILS\n\nPERSON ONE\n\nName: {$scrubbed['one_first_name']} {$scrubbed['one_surname']}\n\nNationality: {$scrubbed['one_nationality']}\n\nDOB: {$scrubbed['one_dob']}\n\nGender: {$scrubbed['one_gender']}\n\nHealth-Diet: {$scrubbed['one_extras']}\n\nInsurer, Policy Number, Expiry date): {$scrubbed['one_ins_co']}, {$scrubbed['one_pol_no']}, {$scrubbed['one_exp_date']}\n\n\nPERSON TWO\n\nName: {$scrubbed['two_first_name']} {$scrubbed['two_surname']}\n\nNationality: {$scrubbed['two_nationality']}\n\nDOB: {$scrubbed['two_dob']}\n\nGender: {$scrubbed['two_gender']}\n\nHealth-Diet: {$scrubbed['two_extras']}\n\nInsurer, Policy Number, Expiry date): {$scrubbed['two_ins_co']}, {$scrubbed['two_pol_no']}, {$scrubbed['two_exp_date']}\n\n\nPERSON THREE\n\nName: {$scrubbed['three_first_name']} {$scrubbed['three_surname']}\n\nNationality: {$scrubbed['three_nationality']}\n\nDOB: {$scrubbed['three_dob']}\n\nGender: {$scrubbed['three_gender']}\n\nHealth-Diet: {$scrubbed['three_extras']}\n\nInsurer, Policy Number, Expiry date): {$scrubbed['three_ins_co']}, {$scrubbed['three_pol_no']}, {$scrubbed['three_exp_date']}\n\n\nPERSON FOUR\n\nName: {$scrubbed['four_first_name']} {$scrubbed['four_surname']}\n\nNationality: {$scrubbed['four_nationality']}\n\nDOB: {$scrubbed['four_dob']}\n\nGender: {$scrubbed['four_gender']}\n\nHealth-Diet: {$scrubbed['four_extras']}\n\nInsurer, Policy Number, Expiry date): {$scrubbed['four_ins_co']}, {$scrubbed['four_pol_no']}, {$scrubbed['four_exp_date']}\n\n\nPERSON FIVE\n\nName: {$scrubbed['five_first_name']} {$scrubbed['five_surname']}\n\nNationality: {$scrubbed['five_nationality']}\n\nDOB: {$scrubbed['five_dob']}\n\nGender: {$scrubbed['five_gender']}\n\nHealth-Diet: {$scrubbed['five_extras']}\n\nInsurer, Policy Number, Expiry date): {$scrubbed['five_ins_co']}, {$scrubbed['five_pol_no']}, {$scrubbed['five_exp_date']}\n\n\nPERSON SIX\n\nName: {$scrubbed['six_first_name']} {$scrubbed['six_surname']}\n\nNationality: {$scrubbed['six_nationality']}\n\nDOB: {$scrubbed['six_dob']}\n\nGender: {$scrubbed['six_gender']}\n\nHealth-Diet: {$scrubbed['six_extras']}\n\nInsurer, Policy Number, Expiry date): {$scrubbed['six_ins_co']}, {$scrubbed['six_pol_no']}, {$scrubbed['six_exp_date']}\n\n\n\nOPTIONAL EXTRAS\n\n{$scrubbed['optional_extras']}\n\n\n\nCLIMATE CARE OR CHARITY DONATION\n\nPerson 1: {$scrubbed['one_charity']}\n\nPerson 2: {$scrubbed['two_charity']}\n\nPerson 3: {$scrubbed['three_charity']}\n\nPerson 4: {$scrubbed['four_charity']}\n\nPerson 5: {$scrubbed['five_charity']}\n\nPerson 6: {$scrubbed['six_charity']}\n\n\n\nCONTACT DETAILS\n\nContact Name: {$scrubbed['contact_name']}\n\nContact Address: {$scrubbed['contact_address']}\n\nContact Town: {$scrubbed['contact_town']}\n\nContact Postcode: {$scrubbed['contact_postcode']}\n\nContact Telephone: {$scrubbed['contact_tel']}\n\nContact Mobile: {$scrubbed['contact_mobile']}\n\nContact Email: {$scrubbed['email']}\n\nNewsletter: {$scrubbed['newsletter']}\n\n\n\nEMERGENCY CONTACT\n\nEmergency Name: {$scrubbed['emergency_name']}\n\nEmergency Telephone: {$scrubbed['emergency_tel']}\n\nEmergency Mobile: {$scrubbed['emergency_mobile']}\n\nPAYMENT INFORMATION\n\nDeposit Total: {$scrubbed['deposit_total']}\n\nDonation Total: {$scrubbed['climate_care_total']}\n\nTotal Amount: {$scrubbed['total_amount']}\n\nPaying By: {$scrubbed['payment_option']}\n\n\n\nOTHER INFORMATION\n\nNotes: {$scrubbed['notes']}\n\nAccept Conditions: {$scrubbed['accept_conditions']}\n\n"; $body = wordwrap($body, 90); // Send the email: mail('OUR EMAIL ADDRESS REMOVED HERE', 'Online Booking Form', $body, "From: {$scrubbed['email']}"); // Print a message: echo 'OUR THANK YOU MESSAGE REMOVED HERE'; // Clear $_POST (so that the form's not sticky): $_POST = array(); } } // End of main isset() IF. ?> <?php if (isset($_POST['submitted'])) { if (empty($scrubbed['accept_conditions'])) { echo '<p class="make_red"><span class="highlighted_text">Please tick the "I accept" box at the bottom of the form to agree to booking conditions</span></p>'; } } ?>