javamail - how to build a mail server in java -

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Greetings Everyone has an app with me (Spring + hibernate), which needs to send thousands of emails at once and I It was told that the best solution here is a mail server, I have no idea where to start or if there is any structure or service better, please give me some information from where to start, thanks.

You do not create a mail server to send email to you to access the mail server (SMTP server) To use the JavaMail API.


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