[Postfix-es] Problemas con smtp autenticado en telefonica.net

[Felipe Bello]

Por si sive de clarificación, le he elevado el loglevel al postfix para las
conexiones con telefonica.net y lo que me cuenta es esto:

postfix-script: starting the Postfix mail system

smtp: < smtp.telefonica.net[213.4.129.135]: 220 ESMTP service ready on
smtp: > smtp.telefonica.net[213.4.129.135]: EHLO miservidor.midominio.com
smtp: < smtp.telefonica.net[213.4.129.135]: 250-telesmtp4.mail.isp
smtp: < smtp.telefonica.net[213.4.129.135]: 250-ETRN
smtp: < smtp.telefonica.net[213.4.129.135]: 250-DSN
smtp: < smtp.telefonica.net[213.4.129.135]: 250-SIZE 26214400
smtp: < smtp.telefonica.net[213.4.129.135]: 250-AUTH PLAIN LOGIN
smtp: < smtp.telefonica.net[213.4.129.135]: 250 AUTH=LOGIN
smtp: server features: 0x29 size 26214400
smtp: maps_find: smtp_sasl_passwd: hash:/etc/sasl_passwd(0,100):
smtp.telefonica.net = usuario_telefonica$telefonica.net:password_telefonica
smtp: smtp_sasl_passwd_lookup: host `smtp.telefonica.net' user
`usuario_telefonica$telefonica.net' pass `password_telefonica'
smtp: starting new SASL client
smtp: name_mask: noanonymous
smtp: smtp_sasl_authenticate: smtp.telefonica.net[213.4.129.135]: SASL
mechanisms PLAIN LOGIN LOGIN
smtp: smtp_sasl_get_user: usuario_telefonica$telefonica.net
smtp: smtp_sasl_get_user: usuario_telefonica$telefonica.net
smtp: smtp_sasl_get_passwd: password_telefonica
smtp: smtp_sasl_authenticate: smtp.telefonica.net[213.4.129.135]: uncoded
initial reply: usuario_telefonica$telefonica.net
smtp: > smtp.telefonica.net[213.4.129.135]: AUTH PLAIN
Y2FzYW1hc2F2ZXUkdGVsZWZvbmljYS5uZXQAY2FzYW1hc2F2ZXUkdGVsZWZvbmljYS5uZXQAcXVl
c2l5bw==
smtp: < smtp.telefonica.net[213.4.129.135]: 501 Invalid Login
smtp: connect to subsystem private/defer
smtp: send attr nrequest = 0
smtp: send attr flags = 0
smtp: send attr queue_id = 88638F888B
smtp: send attr original_recipient = usuario_destino en telefonica.net
smtp: send attr recipient = usuario_destino en telefonica.net
smtp: send attr offset = 272
smtp: send attr status = 4.0.0
smtp: send attr action = delayed
smtp: send attr reason = Authentication failed: SASL authentication failed;
server smtp.telefonica.net[213.4.129.135] said: 501 Invalid Login
smtp: private/defer socket: wanted attribute: status
smtp: input attribute name: status
smtp: input attribute value: 0
smtp: private/defer socket: wanted attribute: (list terminator)
smtp: input attribute name: (end)
smtp: 88638F888B: to=<usuario_destino en telefonica.net>,
relay=smtp.telefonica.net[213.4.129.135], delay=4, status=deferred
(Authentication failed: SASL authentication failed; server
smtp.telefonica.net[213.4.129.135] said: 501 Invalid Login)
smtp: flush_add: site telefonica.net id 88638F888B
smtp: match_hostname: telefonica.net ~? miservidor.midominio.com
smtp: match_hostname: telefonica.net ~? localhost
smtp: match_list_match: telefonica.net: no match
smtp: flush_add: site telefonica.net id 88638F888B status 4
smtp: name_mask: resource
smtp: name_mask: software
smtp: disposing SASL state information