Occasionally, customers like to configure or customize the return errors provided to other SMTP servers. While this is generally frowned upon, legitimate reasons do exist—to provide additional information, to provide system administrator contact information, and so forth.
The return messages are localized to a point—depending upon which version of the messaging software was installed and the level of customization, you might have German, Spanish, French, and English, so you may have to modify several files. This book only describes the English (en) locale.
The return codes are stored in the following directory:
where msg-Home is the directory where the messaging ...