Sending Bulk Emails using PHP

问题

I have to send mails to all users in the site when a new user joins. My problem is the script stops execution after sending around 400 mails. I have set the set_time_limit to 0. And also I am giving sleep(2) after sending 10 mails.

What may be the reason behind this issue.Any solution for this problem . Is there any better method to send bulk emails?

Thanks in Advance

Rose

回答1:

The way we do it is with the help of cron.

We (at our company) split up the userlist in blocks of 50 addresses. These blocks are put in a table in the database (with data that links this block to the e-mail data (headers, body, ..).

Through a cron.php file, which is triggered every 5 minutes or so, the system grabs the first available block in the database that needs to be sent and sends out the emails.

回答2:

I had a similar issue and it was down to memory usage, how are you sending them, can you provide any code?

回答3:

If PHP is running in safe mode, set_time_limit will have no effect. If you must run PHP in safe mode, you can modify the default time limit using the configuration directive max_execution_time.

回答4:

I don't know why your script stops. But you also asked for better ways to send bulk emails. I found that using an email package gives you much more control than the built-in PHP mail command. Swift Mailer is a very good one.

回答5:

Try setting up a task queue. When your web application wants to send an email, it adds it to a database of tasks and a separate daemon processes each one. This means, you can set an email to be sent to every member of the website and your daemon will send each one every 2-4 seconds. See the Kohana task queue module (PHP), Delayed_job (Ruby), and Celery (Python) for some inspiration.

回答6:

I'm posting a new answer because this one doesn't relate to my previous one.

I was wondering: where exactly do you set set_time_limit to 0? I mean, is it in php.ini, .htaccess, or from a php file with ini_set().

Is it possible that this value gets overridden?

来源：https://stackoverflow.com/questions/2938037/sending-bulk-emails-using-php