Fixing the "smsbox_list empty" error in Kannel

I got this error even though I had an smsbox defined.

Unfortunately I had forgotten to create the smsbox-route group, so this is a very quick fix:

#---------------------------------------------
## SMS ROUTING
##---------------------------------------------
group = smsbox-route
smsbox-id = mainbox
smsc-id = ztemodem-smsc-group
sim-buffering = false
... continues ...

Just make sure the id's matchup, so my smsbox group begins with this:

#---------------------------------------------
## SMS BOX
##---------------------------------------------
group = smsbox
smsbox-id = mainbox
... continues ...

And my SMSC looks like this:

#---------------------------------------------
## GSM MODEM SMSC
##---------------------------------------------
group = smsc
smsc-id = ztemodem-smsc-group
... continues ...

This successfully cleared the "smsbox_list empty" error and allowed messages to be delivered properly. Kannel had until then been able to send messages and receive delivery reports, but was not reading messages stored on the SIM.

I've included sim-buffering = false in the above config because some people on the kannel mailing list suggested experimenting with it.

Also, the "message-storage" tag in my modem definition is set to "sm". Some people suggested trying it on "me", but this didn't solve the problem for me and setting to "sm" now works.

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