[asterisk-users] Access Voicemail Asterisk 1.8 FreeBSD 8.2

[motty.cruz]

Hello, I'm new to this list. I'm trying to configure my Asterisk to have
user access their email. SO far users can leave voicemail but they can't
access voicemail. As you can see I had sip.conf and extensions.conf below.
Please advice how to access configure extensions.conf to have users access
their voicemail. 

Thanks in advance.
-motty

SIP.CONF
[general]
context=default
srvlookup=yes
realm = domain.tld
disallow=all
allow=ulaw
allow=gsm
language=en

register => user1:passwd at host.domain.tld/user1
register => user2:passwd at shost.domain.tld/user2
register => user3:passwd at host.domain.tld/user3

[user1]
type=friend             ; make and recieved calls
callerid="user1" <5001> ; caller id
secret=passwd        ; password
host=dynamic            ; how to find a client
qualify=yes             ; qualify peer is no more than 2000 ms away
nat=yes                 ; this phone is not natted
host=dynamic            ; this device registers with us
fromuser=user1          ; calling from user
fromdomain=domain.tld   ; calling from domain realm
canreinvite=no          ; allow RTP voice traffic to bypass Asterisk
context=internal        ; the internal context controls what we can do
fromdomain=domain.tld   ; from domain -the domain that the username is from
mailbox = 5001 at default  ; avoid-Received SIP subscribe for peer without
mailbox-mess

[user3]
type=friend
callerid="user3" <5003>
secret=passwd
host=dynamic
qualify=yes             ; qualify peer is no more than 2000 ms away
nat=yes                 ; this phone is not natted
host=dynamic            ; this device registers with us
fromuser=user3          ; user id from
fromdomain=domain.tld      ; realm of user
canreinvite=no          ; asterisk by default tries to redirect
context=internal        ; the internal context controls what we can do
fromdomain=domain.tld      ; from domain -the domain that the username is
from
mailbox = 5003 at default  ; avoid-Received SIP subscribe for peer without
mailbox-mess
(END)

Extensions.conf

[default]
exten => 5001,1,Dial(SIP/user1,20)
exten => 5001,2,VoiceMail(5002 at default)
exten => 5001,4,PlayBack(vm-goodbye)
exten => 5001,5,Wait(2)
exten => 5001,6,HangUp()

exten => 5002,1,Dial(SIP/user2)
exten => 5002,2,VoiceMail(5002 at default)
exten => 5002,3,PlayBack(vm-goodbye)
exten => 5002,4,Wait(2)
exten => 5002,5,HangUp()

exten => 5003,1,Dial(SIP/user3)
exten => 5003,2,VoiceMail(5002 at default)
exten => 5003,4,PlayBack(vm-goodbye)
exten => 5003,5,Wait(2)
exten => 5003,6,HangUp()

[internal]
include = default
exten => 5XXX,1,Dial(SIP/${EXTEN})
exten => 5XXX,2,Voicemail(${CALLERID},u)
exten => 5XXX,3,Hangup