fatal: no SASL authentication mechanisms

Configurando sasls con debian para postfix encuentro estos mensajes en /var/log/mail.log

[shell]
Mar 9 13:18:05 mailserver postfix/smtpd[15016]: fatal: no SASL authentication mechanisms
Mar 9 13:18:06 mailserver postfix/master[15011]: warning: process /usr/lib/postfix/smtpd pid 15016 exit status 1
Mar 9 13:18:06 mailserver postfix/master[15011]: warning: /usr/lib/postfix/smtpd: bad command startup — throttling
[/shell]

La solucion:
[shell]
apt-get install libsasl2-modules
[/shell]