Header Usage byMailing Lists
RFC822 suggests common sense:
- The Sender field should be used instead of the From field to report errors and problems
- The Sender field should NEVER be used automatically, in a recipients’ s reply message
- Replies should go to the Reply-To field instead of the From field
New (nonstandard) headers for mailing lists
- Errors-to is an explicit routing for all errors, bounce messages, etc
- Error-Reply is the same thing, it was just made up by somebody else