Spring email 代表[关闭]发送消息

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How to send message in form of:

From <Sender> on behalf of <User>

with Spring mail?

Answer 1

Headers From and Sender must differ to display On Behalf Of in your message. To make it with Spring mail:

1. In application.yml you should set extra properties for smtp:

spring:
  mail:
    host: ...
    username: ...
    protocol: smtp
    properties:
      mail:
        smtp:
          # these parameters helped
          auth: true
          starttls.enable: true
          from: <Sender>
          host: <duplicate spring.mail.host> 

2. Use MimeMessage instead of SimpleMailMessage

MimeMessage message = mailSender.createMimeMessage();

3. Use addFrom instead of setFrom in MimeMessage

MimeMessage message = mailSender.createMimeMessage();
message.addFrom(...); // add User email on behalf whom you want to send

4. Pass Sender email with setSender()

message.setSender(...);

These threads helped:

• What's the difference between Sender, From and Return-Path?
• How to set the Return-Path to an email address other than Sender address using JavaMail?
• https://coderanch.com/t/274415/java/set-Return-Path-email-address