如何使用 Codeigniter 设置 smtp 认证电子邮件的返回路径？

Question

我有下面使用codeigniter的代码，

$config['mailtype'] ='html';
$config['charset'] = 'iso-8859-1';
$config['protocol'] ='smtp';
$config['smtp_host'] ='mail.DomainName';
$config['smtp_user'] = "UserEmailId";
$config['smtp_pass'] = "UserPassword";
$config['smtp_port'] ='25';
$this->email->clear(TRUE);

$this->email->initialize($config);
$this->email->from($fromemail, $fromname);
$this->email->to( $email_to );
$this->email->return_path("BouceEmailId"); // I have made this function in system/library/email.php. Also changed the mail() -f field from _headers['from'] to _headers['return-path']

$this->email->subject( "Subject" );
$this->email->message( "This is test email" );

$this->email->send();

在上面的代码中它发送了一封电子邮件。但它删除了我设置的返回路径，它只是用发件人地址替换它。 我读过一些文章说 SMTP 在发送时设置了返回路径。

使用 SMTP 验证时如何设置返回路径？

SMTP 不允许为退回的电子邮件设置自定义 return_path。投递时会自动设置return_path和from地址。

Answer 1

阅读手册CL Email Class

参数：
$from (string) – “发件人”电子邮件地址 $name (string) – “发件人”显示名称 $return_path (string) – 可选的电子邮件地址，将未送达的电子邮件重定向到 退货：
CI_Email 实例（方法链）

You can also set a Return-Path, to help redirect undelivered mail:

$this->email->from('you@example.com', 'Your Name', 'returned_emails@example.com');