The mailing list for listmasters using Sympa

[Eric Lopez <address@concealed>]

Dear List,
This is my first  time installing sympa. I am trying to use our existing 
ldap directory to authenticate users. This directory  has a  md5  
encrypted  pasword for every user in our university, and it's being used 
for email, samba and other things.

When I try to login to sympa (using just the uid or my complete email) I 
get the following error:
Nov 28 21:04:17 redirector wwsympa[7263]: [robot listas.ues.edu.sv] 
[client 168.243.2.246] do_login(address@concealed)
Nov 28 21:04:17 redirector wwsympa[7263]: authentication: incorrect 
password for user address@concealed
Nov 28 21:04:17 redirector wwsympa[7263]: Authentication failed

Here's my  auth.conf
ldap

      host                            directorio.ues.edu.sv:389
      timeout                         20
      bind_dn                         cn=reader,dc=ues,dc=edu,dc=sv
      bind_password                   reader
      suffix                          dc=ues,dc=edu,dc=sv
      get_dn_by_uid_filter            (&(uid=[sender])(svuesActivo=1))
#       get_dn_by_email_filter          (&(mail=[sender])(svuesActivo=1))
      email_attribute                 mail
      scope                           sub

Now, the error above states that the password is incorrect which is very 
confusing to me since there's no user password field specified in the 
configuration file.
Any and help and comments will be greatly appreciated.
best regards,
eric.