OS: Ubuntu 14.04 LTS Server 
Postfix version: 2.11.0-1ubuntu1 
Cyrus SASL Version: 2.1.25.dfsg1-17build1 


I am unable to authenticate users using Postfix and Cyrus SASL. SASL appears to 
be correctly configured: 

sudo testsaslauthd -u test -p test 
0: OK "Success." 

However when I perform a telnet to port 587 I receive the following: 

535 5.7.8 Error: authentication failed: authentication failure 

I've configured the file "/etc/postfix/sasl/smtpd.conf" with the following: 
pwcheck_method: saslauthd
    mech_list: PLAIN LOGIN 

I've also placed a "smtpd.conf" file in "/usr/lib/sasl2" as well. 

I've also added the "postfix" user to the "/etc/group" "sasl" group member. 

I've searched the Internet high and low and I'm unable to find any reason for 
the failure. Using "-vvv" in the "master.conf" file doesn't reveal any useful 
information in the log files. Is there any additional logging I can enable to 
track down this problem (lack of logging is really frustrating). 

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