All incoming smpt messages are stored in the
incoming smtp directory with the extension
"ser".
If the message has a recipient who has
been registered, as a local user in a local
domain, with JES, then it is picked up by the
local delivery service and directed to (stored in)
the local user's directory using a "loc" file
extension.
If there is a non-local recipient then it is picked
up by the RemoteSender class and sent to the
remote host as defined by the recipient's domain
name.
The Full Transfer Mode means:
Receive all smtp messages, send outgoing messages
to non-local recipients, store messages for local users
in their respective folders.
Here is the relative excerpt from mail.conf:
# Mail Transfer Mode. Options are: Full, Local, Remote (case
# insensitive)
# In full mode all incoming and outgoing SMTP messages will be
# served as expected.
# In local mode, mail is delivered only to local recipients. Any
# connecting client is accepted as a valid mail sender, provided
# no security issues arise.
# In remote mode, no messages for local recipients are accepted.
# Only authenticated users (that is users belonging to a domain
# serviced by a JES instance, who properly authenticate) are
# allowed as valid mail senders.
Do note that JES operates in full mode by default.
I hope this clarifies the JES storing mechanism
for you.
Andreas