'Allo, I'm having some troubles doing smtp authentication using PAM through cyrus-sasl. Trying 127.0.0.1... Connected to host.domain. Escape character is '^]'. 220 host.domain ESMTP Postfix EHLO host 250-host.domain 250-PIPELINING 250-SIZE 10240000 250-ETRN 250-AUTH PLAIN 250 8BITMIME AUTH PLAIN <base64 string> 535 Error: authentication failed Here's the relevant information in from the syslog: Mar 8 10:39:37 josephs1 PAM_unix[31999]: authentication failure; (uid=502) -> josephs for smtp service Mar 8 10:39:37 josephs1 PAM-warn[31999]: service: smtp [on terminal: <unknown>] Mar 8 10:39:37 josephs1 PAM-warn[31999]: user: (uid=502) -> josephs [remote: ?nobody@?nowhere] I'm encoding the username/password as indicated by the cyrus-sasl README: printf 'username\0username\0password' | mmencode , nor does authentication work with various mail clients. Is it easy to get some additional debugging information from PAM, such as what it's receiving, or is there another problem? I'm running the most recent stable postfix (20010228), cyrus-sasl (1.5.24), and PAM (0.72-37). Thanks! joseph sheedy josephs@oeone.com www.oeone.com