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- Changes from PP version 5.2 to 6.0
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- _1. _O_v_e_r_v_i_e_w
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- This short document is a description of the more
- user/administrator visible changes that have taken place in
- PP between the last interim version (5.2) and the beta ver-
- sion (6.0). This document is not exhaustive or complete but
- is a guide to what to look out for. In general the following
- may be assumed.
-
- o+ The Queue files are compatible between 5.2 and 6.0.
- Note however that the Queue structure has changed. Old
- channels will have to be recompiled to recognise the
- new format, but new channels will read old queue files.
-
- o+ The qmgr protocol is compatible between 5.2 and 6.0
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- o+ The syntax of some of the table files has changed.
- Where appropriate conversion scripts are provided.
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- o+ Some procedure calls have been changed or have dif-
- ferent parameters.
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- o+ the libdsap.a library is now required for compilation.
-
- In summary, you should be careful when upgrading to the 6.0
- release. It will not work by just replacing the 5.2
- binaries with 6.0. For definite the domain table will HAVE
- to be changed.
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- _2. _D_e_t_a_i_l_e_d _c_h_a_n_g_e_s
-
- This list is in no particular order of preference or impor-
- tance.
-
- Domain Table
- The domain table syntax has been changed to be more
- explicit and has been brought into line with the OR
- table syntax. We feel this is clearer and more logical.
- Tools that process the domain table have been taught
- the new format and there are scripts in
- Tools/tables/compat to convert between the old and new
- formats. There is NO backwards compatibility here. Old
- format tables will just plain not work.
-
- Aliases Table
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- December 18, 1991
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- The aliases table syntax has changed to a main choice
- of synonym or alias with further qualifiers specifying
- the address type of the synonym or alias. The changes
- are
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- x:alias y x:alias y
- x:synonym y x:synonym y
- x:822-synonym y x:synonym y 822
- x:x400-synonym y x:synonym y x400
- x:822 y x:alias y 822
- x:x400 y x:alias y x400
- where any white space in y must be quoted using a
- backslash There is also a "external" qualifier. This
- disables further lookups of synonyms and aliases and
- can be used for a main site mail hub mapping from
- site_wide_name@localsite to
- local_machine_name@localmachine and vice versa. The
- use of external stops the looping alias problem which
- would otherwise occur.
-
- Return of Contents
- Return of contents is now supported. This is a side
- effect and part of the work on routing of delivery
- reports.
-
- Use of pepsy
- Use of the PEPSY ASN.1 compiler rather than PEPY/POSY
- is now used in many places. This makes for smaller
- binaries and much quicker compilation.
-
- ISODE 7.0
- PP 6.0 is aligned to ISODE 7.0. It will not work under
- ISODE 6.0. If you are using the 6.0 release you should
- be using ISODE 7.0. It should however work under ISODE
- 6.8.
-
- Tailor file
- There have been many changes to the tailor file. The
- introduction of several new variables and the splitting
- up of header and body part types. These are
-
- dap_user Directory username for DS lookups
- dap_passwd Directory Passwd for same
- fsync disable use of fsync(2)
- headertype list of headers c.f. bodypart
- queuestruct use hierarchical queue structure
- submit_addr call submit over network
- diskuse limit the disk space consumed by PP
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- Channel tailoring also has a number of new variables
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- drchan replaces old outchan
- hdrin headers inbound
- hdrout headers outbound
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- December 18, 1991
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- ininfo inbound channel info
- inadr inbound channel addr type
- insubadr inbound channel sub address type
- intable inbound channel table
- key give alternative names to channel
- mtatable list of known mtas for channel binding
- outinfo outbound channel info
- outsubadr outbound channel sub address
- outtable outbound channel table
- solo-proc channel requires address one at a time
- bad-sender-policyset the policy for unroutable senders
- check set the checking mode of the channel
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- Channel pairing
- Channels may now be explicitly paired together. This
- allows one definition to specify both an inbound and an
- outbound channel. It also allows several logical chan-
- nels for one inbound protocol by selecting a channel
- per MTA.
-
- Timezones
- Many more lettered timezones are recognised. This list
- is ambiguous at best and numeric forms should really be
- used except at user interfaces.
-
- Delivery Reports
- Delivery reports are now routed back to their origina-
- tor. In 5.2 they were returned directly down the chan-
- nel they arrived on. This allows for one way links in
- general makes things easier. It also allows protocol
- conversion so that, for instance, a delivery report on
- an X.400 message may go back via an RFC-822 if that is
- the only option. A side effect of this is the channel
- variable outchan has been renamed drchan and has dif-
- ferent semantics attached to it (see the manual).
-
- Header parts
- Separation of headers and bodyparts for each channel.
- This is mainly a syntactic change but will allow more
- flexibility later. The upshot is you may need both
- bptin/bptout and hdrin/hdrout types in channel defini-
- tions.
-
- Local delivery
- The local channel table (ch.local) has had a change of
- syntax. The old format should still work, but the new
- format (which is key=value) based allows much more
- flexibility and setting of options for mail managers.
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- MTA Console
- The MTA Console has been changed to show more statis-
- tics and has a new heuristics for showing just channel
- and MTA summary information. This is useful for very
- large queues.
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- December 18, 1991
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- Line Console
- Two line based console programs have been provided.
- These give some of the functionality of the MTA console
- for dumb terminals.
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- Directory lists
- The directory list program has been improved more. It
- now has several associated tools to convert file based
- lists into directory based lists. There is also a
- checkup tool.
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- Performance
- Some work has been done on general performance. In gen-
- eral the system should run slightly faster and have
- less problems with large queues.
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- X.400(88) OIDs
- One of the X.400(1988) object identifiers was
- incorrect. Originally the code used the object identif-
- ier designated in the Blue Book. It now uses the one
- given in the implementors guide.
-
- Mail 11
- Our thanks must go to Nigel Titley of British Telecom
- for the donation of a Decnet Mail-11 channel. This
- allows interworking with DECNET and PP.
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- G3Fax channel
- A skeleton outbound G3 Fax channel is included. There
- are currently two drivers written using this skeleton,
- one for the Fujitsu dexNet200 modem and one for the
- Panasonic SystemFax 250 machine. These channels enable
- PP to send appropriately encoded messages via fax.
- There are a couple of reformatter filters which convert
- an hdr.822 to a fax coverpage and an ia5 bodypart to a
- g3fax bodypart. These reformatters produce X.400 g3fax
- bodyparts and so are general use and are not dependent
- on any fax machine.
-
- Splitter Channel
- A Splitter channel is included. This channel together
- with the presence of solo-proc=yes in channel entries
- in the tailor file enables exclusive processing for
- specified recipients. This was introduced for the fax
- reformatter channels.
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- Address Parsing
- The address parsing code has been restructured exten-
- sively. This should be more efficient in many cases.
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- X.400 Extensions
- X.400(88) address extensions are now recognised.
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- X.400 addresses
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- December 18, 1991
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- Address parsing recognises A as ADMD and P as PRMD in
- RFC1148 encoded X.400 addresses. These are converted to
- the form given in RFC1148.
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- Multi level queue
- For very large system (queues in excess of about 4000
- messages) a multi-level queue can be used. if this is
- in effect messages are placed at random in subdirec-
- tories of the main queue to reduce the time required by
- the system to locate files.
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- Authorisation Warnings
- Authorisation warnings are now implemented. If a mes-
- sage fails authorisation, a warning can be optionally
- sent to the originator and/or the recipient.
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- Delayed delivery warning
- Warnings of delays in delivery are now sent to the ori-
- ginator of the message if the message cannot be
- delivered in a timely fashion.
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- Submit daemon
- Submit can be run as a daemon in addition to its normal
- directly executed form. This may give performance
- improvements for inbound messages.
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- administrator assigned alternate recipient
- The system manager can direct bad address to a default
- mailbox, where numerous actions may be attempted (such
- as returning helpful messages about approximate match-
- ings etc.)
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- X.400(88) downgrading
- A filter to downgrade X.400(88) P2 headers to X.400(84)
- P2 headers has been provided. Similarly downgrading of
- P1 is done in the appropriate channels. This new
- filter may also be used to normalise OR addresses in
- these headers.
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- Body part support
- Support of a number of different body types, including
- ISO-6937, ISO-8859, and T.61 character sets.
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- New queue format
- A new queue format has been introduced. We believe this
- will give greater reliability and flexibility. There
- are now no special subdirectories of the queue, every-
- thing is directly under the queue directory. There is a
- utility to convert the old format into the new format
- (Tools/tables/compat/que_o2n). New format for the
- internal structure of the message queue has also been
- added in a backwards compatible way.
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- ckadr
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- December 18, 1991
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- ckadr no longer guesses which format of addressing an
- address is (x400 or rfc822). Explicit choice should be
- made via the -x and -r flags (-r is default) It also no
- longer checks for UK domain ordering by default i.e.
- will only identify US domain ordering). Checking for
- UK ordering can be done via the -b flag.
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- Disk checking
- Submit can be tailored to check the amount of free
- space available on disk and not submit messages if this
- is below some threshold. This is not supported on all
- systems.
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- Control of header type
- The specification of a nondefault header type in the
- inbound channel will override the default header types
- such as hdr.822 and hdr.p2. This will enable a site to
- minimise the header manipulation/normalisation done.
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- Bad senders
- The system manager can control the policy for dealing
- with bad senders on an inbound channel basis.
-
- X.400(88) Extensions
- X.400(88) O/R Address extensions have been implemented
- and are useable for routing.
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- loc_dom_mta, loc_dom_site
- Previously these two values were magically recognised
- as local when normalising and routing RFC 822
- addresses. This magic has been removed and now you
- need explicit entries for these in the domain table
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- redirection history
- X.400 redirection history is now supported. This shows
- up a bug in PP 5.* which may cause PP 5.* MTA to break
- when interworking over x400 with a PP 6.0 MTA. Note
- that aliases are implemented as redirects.
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- table overrides
- Tables may been overriden by explicit key/value pairs
- given in the tailor file.
-
- _3. _U_p_g_r_a_d_e _p_a_t_h
-
- This is the basics of how to upgrade from PP 5.2 to
- 6.0.
-
- Compile
- Compile pp-6.0 and install.
-
- domain table
- Convert the domain table into the new format. There are
- some tools under Tools/tables/compat to aid in this,
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- December 18, 1991
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- but you may want to rethink how you generate these a
- little. This is the major change in this version. Also
- check that the relevant entries for loc_dom_site and
- loc_dom_mta are present in the domain table as they are
- no longer magically recognised.
-
- alias table
- This should be altered into the new format. The conver-
- sion routine in Tools/tables/compat may help again.
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- local table
- This should be backwards compatible, but you may want
- to change to the new format anyway.
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- Queue
- Any files in the queue should be converted to the new
- format. This can be done by the following:
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- Tailoring
- Change the tailor file to use the new keys and values.
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- Checkup
- Run ckconfig and see that everything is sensible.
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- restart
- Rebuild the database and restart.
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- December 18, 1991
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