Email system-is it inappropriate to use phpmailer to write a mass mailing system?

The number of mass mails is relatively large. Each group has about 20 million mails. I have never done it before. Can you use cases? The number of mass mails is relatively large. 20 WI have never done it before. Can you use cases?

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The number of mass mails is relatively large.20 WI have never done it before. Can you use cases?

It is better to use a third party, and the group function is difficult to do by yourself.

For example, myemailmarketing is also based on PHP, but you need to purchase a license. You need to use a computer to open it during Group Sending. During group sending, you need to keep the computer on.

My company used myemailmarketing for Group Sending. It waited until myemailmarketing was opened. It may wait until the morning of the next day before sending 10 million emails, and sometimes the network problem was stopped, re-launch is required to proceed.
If you plan to use phpmailer as a group system, the efficiency is not as high as myemailmarketing.

Later, we used sendy for Group Sending. It is said that the Group Sending efficiency was very high.
Https://sendy.co/

Mailchimp is generally used for group subscriptions abroad. I have seen many group services available in China.

Without a third party, php is difficult to implement. beanstalk or redis can be used for message queues. I used to use php to throw data into the queue and use node. js listens to the queue to send emails, which is appropriate.