我正在为生产应用程序提供支持，该应用程序已经可以发送电子邮件并阅读弹跳的电子邮件。
当应用程序需要发送电子邮件时，它会从myemaildomain.com获取DNS MX记录，目前DNSlookUp解决了两个主机。
我知道，要设置将弹跳到电子邮件的位置（如果输送失败，例如弹跳，软弹跳等），则必须将来自域名设置为域名，以发送弹跳电子邮件tor，例如bounce.myemaildomain.com，
我不明白的是，该应用程序是为何将信封邮件从
new StringBuilder(32).append("return-").append(UUID.randomUUID().toString()).append("@").append("anothercompanydomain.com");
一个示例中设置为：“ [email protected]"
Also the application is starting a local SMTP server to read bounced emails, but this is also the part I don't understand, how is this SMTP如果该应用程序的托管域不同于另一个CompanyDomain.com，则可以读取弹跳的电子邮件？另外，如果来自Verp的信封邮件是可变的，它如何读取所有带有一个帐户的弹跳电子邮件？
I'm giving support to a production application which is already able to send emails and also to read bounced emails.
When the applications needs to send an email it fetches DNS MX records from myemaildomain.com, currently that dnslookup resolves to two hosts.
I understand that in order to set where the email will be bounced to (in case of delivery failure e.g. hard bounce, soft bounce, etc.) the ENVELOPE MAIL FROM must be set with the domain name where it is desired to send the bounce email to, e.g bounce.myemaildomain.com
What I don't understand is why the application is setting the ENVELOPE MAIL FROM as
new StringBuilder(32).append("return-").append(UUID.randomUUID().toString()).append("@").append("anothercompanydomain.com");
An example would be: "[email protected]"
Also the application is starting a local SMTP server to read bounced emails, but this is also the part I don't understand, how is this SMTP server able to read the bounced emails if the domain where this app is hosted is different than anothercompanydomain.com? Also if the ENVELOPE MAIL FROM is variable because of VERP how is it reading all bounced emails with a single account?
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