PMDF System Manager's Guide

One use of the REVERSE mapping is to simplify long return addresses produced by MRGATE and ALL-IN-1. (Note that this and more serious difficulties with MRGATE, ALL-IN-1, and other MAILbus agents may be overcome with PMDF-MR.)

Suppose that MRGATE is generating return addresses which PMDF translates to RFC 822 addresses of the form

"node::MRGATE::\"AM::user\""@local-host

where node is the DECnet node or cluster alias name, user is the name of an AM mailbox, and local-host is the official local host name for the PMDF node. With the REVERSE mapping table,

REVERSE "node::MRGATE::\"AM::*\""@local-host $Y$0@mrgate.local-host

such addresses may be translated to the simpler address

user@mrgate.local-host

To support such addresses--- user@mrgate.local-host -- you need to modify your PMDF configuration file. To that file, add the two rewrite rules

mrgate mrgate::"am::$u"@mrgate.local-host mrgate.local-host mrgate::"am::$u"@mrgate.local-host

and then add, to the end of the file, a d channel

d 733 nox_env_to defragment linelength 255 ... DECNET-MAIL mrgate.local-host mrgate-node

Here mrgate-node is the DECnet node name of a node running MRGATE. Be sure to add a blank line before the line beginning "d 733". If you already have a d channel defined, then merely add the last line shown above, "mrgate.local-host...", to the end of the d channel definition.

Mail addressed to user@mrgate.local-host will go via MRGATE to the AM mailbox user. If you are on a TCP/IP network, then you should add an MX record to your domain name server database. The MX record should point to the TCP/IP domain name for the system running PMDF. This will allow other systems on the network to send mail to the address user@mrgate.local-host.

For example, if the cluster alias is EXAMPLEVAX, the official local host name example.com, and the node EXAMPLEVAX1 runs MRGATE, then the following should be set up.

• REVERSE mapping table:

  REVERSE "EXAMPLEVAX::MRGATE::\"AM::*\""@example.com $Y$0@mrgate.example.com

• Rewrite rules:

  mrgate mrgate::"am::$u"@mrgate.example.com mrgate.example.com mrgate::"am::$u"@mrgate.example.com

• d channel:

  d 733 nox_env_to defragment linelength 255 ... DECNET-MAIL mrgate.example.com EXAMPLEVAX1