config/pam/smtp

   1 auth sufficient pam_mysql.so user=mail passwd=ipfire host=localhost db=mail table=accountuser usercolumn=username passwdcolumn=password crypt=1 logtable=log logmsgcolumn=msg logusercolumn=user loghostcolumn=host logpidcolumn=pid logtimecolumn=time
   2 auth sufficient pam_unix_auth.so
   3 account required pam_mysql.so user=mail passwd=ipfire host=localhost db=mail table=accountuser usercolumn=username passwdcolumn=password crypt=1 logtable=log logmsgcolumn=msg logusercolumn=user loghostcolumn=host logpidcolumn=pid logtimecolumn=time
   4 account sufficient pam_unix_acct.so