I am building a mail server using Postfix, and set up the authentication to check against a database set-up using Postfixadmin.
I can authenticate via Courier IMAP okay, as it can authenticate against the hashed password properly, but I am suspecting that my SASL + PAM-MySQL SMTP authentication mechanism cannot.
I am getting these errors in /var/log/mail.log
:
pam_unix(smtp:auth): check pass; user unknown
Aug 22 03:23:08 omitted saslauthd[26402]: pam_unix(smtp:auth): authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
Aug 22 03:23:10 omitted saslauthd[26402]: DEBUG: auth_pam: pam_authenticate failed: Authentication failure
Aug 22 03:23:10 omitted saslauthd[26402]: do_auth : auth failure: [user=user@domain.com] [service=smtp] [realm=domain.com] [mech=pam] [reason=PAM auth error]
Here are the contents of /etc/pam.d/smtp
:
auth required pam_mysql.so user=postfixadmin passwd=omitted host=127.0.0.1 db=postfixadmin table=mailbox usercolumn=username passwdcolumn=password crypt=2
account sufficient pam_mysql.so user=postfixadmin passwd=omitted host=127.0.0.1 db=postfixadmin table=mailbox usercolumn=username passwdcolumn=password crypt=2
Here is the relevant snippet for password encryption from /etc/postfixadmin/config.inc.php
:
// Encrypt
// In what way do you want the passwords to be crypted?
// md5crypt = internal postfix admin md5
// md5 = md5 sum of the password
// system = whatever you have set as your PHP system default
// cleartext = clear text passwords (ouch!)
// mysql_encrypt = useful for PAM integration
// authlib = support for courier-authlib style passwords
// dovecot:CRYPT-METHOD = use dovecotpw -s 'CRYPT-METHOD'. Example: dovecot:CRAM-MD5
$CONF['encrypt'] = 'mysql_encrypt';
And here is the content of my /etc/postfix/sasl/smtp.conf
:
pwcheck_method: saslauthd
mech_list: plain login
log_level: 7
allow_plaintext: true
auxprop_plugin: sql
sql_engine: mysql
sql_hostnames: 127.0.0.1
sql_user: postfixadmin
sql_passwd: omitted
sql_database: postfixadmin
sql_select: select password from mailbox where username='%u@%r'
I tried using MD5 hash but Courier would fail. So thats out of the window...