Under some circumstances it may be necessary to route a message through several hosts to get it to the final des- tination. Normally this routing is done automatically, but sometimes it is desirable to route the message manu- ally. This specifies that the message should be sent to hosta, from there to hostb, and finally to hostc. This path is forced even if there is a more efficient path to hostc. Route-addrs occur frequently on return addresses, since these are generally augmented by the software at each host.
Every site is required to have a user or user alias desig- Other Networks.
Some other networks can be reached by giving the name of the network as the last component of the domain. This is not a standard feature and may not be supported at all sites. BIT- NET'' respectively. Route-Address syntax is grotty.