[Postfix-es] 535 invalid user ID or password

[g.69 en adinet.com.uy]

Tengo debian sarge y postfix 2.1.5 estoy utilizando sasl.
Cuanto intento mandar correo a travez de un smarthost (adinet.com.uy) me
devuelve el siguiente error:

(Authentication failed: SASL authentication failed; server mx-adinet.adinet.com.uy[200.40.30.218]
said: 535 invalid user ID or password)

#####Este es mi main.cf######

# See /usr/share/postfix/main.cf.dist for a commented, more complete version

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

defer_transports = smtp
#mynetworks_style = host
myhostname = debian
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = debian, localhost.localdomain, localhost
relayhost = adinet.com.uy
mynetworks = 127.0.0.0/8
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
recipient_canonical_maps = hash:/etc/postfix/recipient_canonical
recipient_delimiter = +
inet_interfaces = all
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/saslpass
smtp_use_tls = yes
smtp_sasl_security_options = noanonymous
smtp_tls_note_starttls = yes

#####fin main.cf #####

##### y el archivo saslpass #####

adinet.com.uy user:pass

##### fin saslpass #####

Ejecute el comando postmap /etc/postfix/saslpass

Alguna idea de que puede estar pasando?