Disk Directory usage of EMWAC Internet Mail Services
This page describes how the EMWAC Internet Mail Services make use of disk
If a registered user on the Windows NT system wishes to receive incoming mail,
she must create an "incoming mail" directory. This directory must match the
"Mailbox Template" which is configured through the EMWAC IMS Control Panel applet.
Mail is delivered into
this directory by the SMTP Delivery Agent, and may be removed from the directory
by the POP3 Server under control of a POP3 client.
Any user's "incoming mail" directory must be an NTFS directory.
This directory can be configured to be created automatically through the EMWAC IMS
When an "incoming mail" directory is created automatically, the POP3S and
SMTPDS will try to create it based on the following rules:
If you plan to create users' mail inbox directories manually, please
follow the above rules to set permissions on each inbox directory.
- if your mailbox template has a pattern "%HOME%\...", POP3S can be used to
create a mailbox directory for a user. The user will have "Full Control" of it,
and the System user will have "Add" permission for it. A user home directory
represented here by %HOME%) should be created by User Manager (for Domains).
- if your mailbox template has a pattern "...\%USERNAME%", both POP3S and SMTPDS can
create a mailbox directory for a user. The SYSTEM user will have "Full Control" of it.
For example, if you have this template as "C:\Mail\%USERNAME%", you have to create
"C:\Mail" directory manually with at least SYSTEM user "Full Control"; and then POP3S
or SMTPDS can create "incoming mail" directories for users.
It is recommended that you run all the IMS Services as the Local System user (the default).
Otherwise, you need set up all the above permissions manually, which is difficult to get
Again, if you have a "%HOME%\..." template, SMTPDS will try to create a mailbox directory
for a user, and if it is sucessful, the user may not have the right permissions on the
directory. Therefore, it is not recommended to create mailboxes this way.
Mail Spool Directory
You can use the configuration program to specify the "Mail Spool Directory" for
the Internet Mail Services. The spool directory contains a number of
subdirectories which are used as
"staging posts" for messages. Some of these subdirectories and the files within them
will have names which exceed the DOS 8.3 filename limitation; therefore it is vital
that the Mail Spool Directory is placed on a disk partition which supports long
file names (eg an NTFS partition).
The directory structure under the Mail Spool Directory is as follows. See the
How it works page for detailed information on how
messages are passed around between directories.
- This directory holds messages received by the SMTP receiver.
The SMTP Delivery Agent also places messages here - eg non-delivery reports
and messages which are sent to mailing lists.
- Messages are moved from the incoming directory into this directory
by the SMTP Delivery Agent.
- When a message is moved into the holding directory, the Delivery Agent
creates a subdirectory within the domains directory for each separate domain to which
the message is addressed. If the message is for a local user, it creates a
subdirectory called $local. In each subdirectory it stores routing information
and information about the message recipients in that domain. (The message itself
stays in the holding directory.)
- This directory contains non delivery messages which are addressed to the Postmaster
but fail to delivery to the Postmaster.
- This directory contains log files created by the SMTP Receiver.
- This directory contains log files created by the SMTP Delivery Agent.
- This directory contains log files created by the POP3 Server.
- This directory contains subdirectories corresponding to mailing lists. For every
mailing list, two directories are created, one corresponding to the list itself, and one
corresponding to the -request address for the list.