How does java realize mass mailing?

1. If you want to send emails efficiently, you can use multithreading to specify batches to send emails.

If you don't want to be seized as spam, there are many places to pay attention to.

Don't include too much picture information in the email, keep it as concise as possible, and don't involve any obscene and pornographic content.

Don't send the same email to the same person.

When sending emails, it's best to use a proxy and change the ip every 50 emails, because the email server will also check that your ip has sent so many emails in such a short time and will think you are a malicious group.

It is best to join the white list or subscription list of email recipients.