How to send large emails without spam? - php

Question

I need to know what is best method to send multiple emails using php. It should not be stored in spam and also should send fast.
I already tried normal mail function in PHP. But it is not working well. Also tried using mail function within loop. Only few mails sent and some of them reached under spam folder.
My project is running at live server. And I am using free hosting service.
My Code:
<?php
include "initialize.php";
if($source_url!='http://kalaivanan.byethost18.com/uadmin/send_result.php')
{
echo "Access Denied";
}
else
{
$id=$_GET['id'];
$get_sem_period1=mysqli_query($con, "SELECT * FROM sem_period where id='$id' ");
$get_sem_period=mysqli_fetch_array($get_sem_period1);
$sem_period=$get_sem_period['sem_period'];
$rrr=mysqli_query($con, "SELECT * FROM results where sem_period='$sem_period' ");
$i=1;
while($row=mysqli_fetch_array($rrr))
{
$get_course=mysqli_query($con, "SELECT course,email FROM student_details where reg_no='$row[reg_no]' ");
$get_course1=mysqli_fetch_array($get_course);
$course_name=$get_course1['course'];
$to=$get_course1['email'];
$get_sub1=mysqli_query($con, "SELECT * from course_details where course_name='$course_name' ");
$get_sub=mysqli_fetch_array($get_sub1);
$sem_no=$row['sem_no'];
$subjects=$get_sub['sem'.$sem_no];
$new_subjects=explode(",",$subjects);
$new_marks=explode(",", $row['sem_mark']);
$echo_subject=null;
for($x=0;$x<sizeof($new_subjects);$x++)
{
if($new_marks[$x]>40)
{
$exam_result="Pass";
}
else
{
$exam_result="Fail";
}
$echo_subject .="<tr><td>".$new_subjects[$x].": ".$new_marks[$x]." - ".$exam_result."</td></tr>";
}
$errors='';
$myemail = 'MYEMAIL';
if( empty($errors))
{
$email_subject = "Enquiry Form: Your Results";
echo "Mail id is: ".$to;
echo $email_body = "<table border='1'>
</br> $sem_period Result Will be Announced: Check Your Marks </br> </br>
<tr>
<td> Register Number: ".$row['reg_no']. "</td>
</tr>
<tr>
<td> Course Name: ".$course_name. "</td>
</tr>
<tr>
<td> Semester: ".$sem_no. "</td>
</tr>
<tr>
<td>MARKS ARE:</td>
</tr>
<tr>
<td> ".$echo_subject." </td>
<td> </td>
</tr>
</table>
";
$headers = "From: $myemail\n";
$headers .= "Reply-To: $myemail";
mail($to,$email_subject,$email_body,$headers);
//redirect to the 'thank you' page
echo "<script>alert('Mail Send Successfully');</script>";
}
$email_address="MYEMAIL";
if (!preg_match(
"/^[_a-z0-9-]+(\.[_a-z0-9-]+)*#[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$/i",
$email_address))
{
$errors .= "\n Error: Invalid email address";
}
}
}
?>
My Answer:
After 1 year, in my experience I learned that for sending large mails without Spam, we have to find good mail service provider.

Answer 1

You should consider using an email sending service, such as Amazons SES, or other marketing tools such as Emma, Mail chimp, sendgrid, mailjet, mandrill, etc.
Free hosts are very susceptible to getting blocked by email servers due to the very nature of use for spam.

Answer 2

This question is a matter of dispute for all the marketers. No one marketer is immune to be called a spammer. These are three main reasons which influence the email reputation:-
Technical setting.
Email content and design.
Reaction to your bulk emails.
A. Technical Settings
Your email must be in the correct format. To ensure the format email underwent you will have to perform SPF and DKIM checkout.
Use a special header in bulk emails for people to know what you send.
Don't forget to add unsubscribe link in an email and it is easy to see and have adequate size and font color.
A reputation of your IP address and domain must be high.
B. Email Content And Design
Avoid using spam words in your mail such as discount, income, money, check, and many more words.
Links that you used in your emails are extremely important. Never take a link from a suspicious resource. Otherwise, it may be fraud.
Your email must be in the plain text version.
C. Recipients’ reaction to your bulk emails
Every email must contain unsubscribe link for the recipient to unsubscribe but not mark as spam.
Name and address of the sender are familiar to the recipients.
The frequency of email sending:- Don't send emails every day. The optimal frequency is not more than once a week.
If you want to know the complete points on this then click here.
I written first time on this community, I hope this article will help you.

Answer 3

If I understood right, you are trying to send emails to multiple users. If so, then try with array & implode() like this below script to send multiple emails. Avoid spam is how you pass the scoring like frz3993 said in comment. And also based on your hosting service provider, the speed, performance factors, etc., measured.
Look that the formatting of this string must comply with RFC 2822 as per Standard.
<?php
$headers = array();
$headers[] = "MIME-Version: 1.0";
$headers[] = "Content-type: text/plain; charset=iso-8859-1";
$headers[] = "From: Kalaivanan <kalai#domain.com>";
$headers[] = "Bcc: Alagu <alagu#domain2.com>";
$headers[] = "Reply-To: Recipient Name <office#domain3.com>";
$headers[] = "Subject: {$subject}";
$headers[] = "X-Mailer: PHP/".phpversion();
$receivers = array('vanan#gmail.com', 'alagukan#gmail.com', 'mathi#gmail.com',.... );
mail(implode(',', $receivers), $subject, $message, $implode("\r\n", $headers));
?>

Answer 4

After few years, I learned many this regarding sending large emails. But the basic this I got from below link. This may be useful for you.