| An unofficial trace header |
Obsolete |
The
Via: header is not defined by RFC2822 but
occasionally appears in mail messages that
sendmail needs to process. It is used by a few
other networks to mark a mail message's transit
through a forwarding host. It is an early, and now obsolete, version
of the Received: header. The
sendmail program counts the
Via: header when determining the hop count but has
no other use for it.
The Via: header should never be declared in the
configuration file.
