On 18.02.2026 03:10 Byunghee HWANG (황병희) wrote: > I've received a few bounce emails in the past, sometimes from Google, > sometimes from the Debian project. For example, it is said that > postfix's header_checks() cannot filter out two "From" fields.
Why should it? The message doesn't seem to comply with the RFC. The normal behavior is to reject such messages and find the cause of the issue. According to the RFC 5322: The from field consists of the field name "From" and a comma- separated list of one or more mailbox specifications.
