postfix can not start

[Scott Haneda]

$port -v
MacPorts 1.710

$port installed | grep -i postfix
   postfix @2.5.5_0+darwin_9+dovecot_sasl+ldap+mysql5+tls (active)

$whereis postfix
/usr/sbin/postfix
* Is whereis hard coded in standard paths, and that is not something I  
can change?

$which postfix
/opt/local/sbin/postfix

$echo $PATH
/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/ 
local/bin:/usr/X11/bin

$sudo /opt/local/sbin/postfix start
dyld: Library not loaded: /opt/local/lib/mysql5/mysql/libmysqlclient. 
16.dylib
   Referenced from: /opt/local/sbin/postfix
   Reason: image not found
Trace/BPT trap
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