Hi, I am using v1.4.22 on CentOS 5.8 (x86_64). Currently, when sending mail from SM, it uses the following setup (config/config.php): $useSendmail = true; $smtpServerAddress = 'localhost'; $smtpPort = 587; $sendmail_path = '/usr/sbin/sendmail'; $sendmail_args = '-i -t'; $pop_before_smtp = false; $pop_before_smtp_host = ''; Here is a typical session, as logged by Postfix: Nov 4 21:43:11 mailserver postfix/pickup[17587]: C58DC6D6771: uid=48 from=<user1@xxxxxxxxxxx> Nov 4 21:43:11 mailserver postfix/cleanup[18472]: C58DC6D6771: message-id=<491e500f4e0148757337cd09c18a0077.squirrel@xxxxxxxxxxxxxxxxxxxxxx> Nov 4 21:43:11 mailserver opendkim[5402]: C58DC6D6771: DKIM-Signature header added (s=default, d=example.com) Nov 4 21:43:13 mailserver postfix/qmgr[25488]: C58DC6D6771: from=<user1@xxxxxxxxxxx>, size=799, nrcpt=1 (queue active) Nov 4 21:43:21 mailserver postfix/pipe[18491]: C58DC6D6771: to=<user2@xxxxxxxxxxx>, relay=dovecot, delay=16, delays=8.9/0.017/0/7.3, dsn=2.0.0, status=sent (delivered via dovecot service) Nov 4 21:43:21 mailserver postfix/qmgr[25488]: C58DC6D6771: removed So, in essence, SM directly feeds Postfix (through "pickup"). Can we configure SM to explicitly use SMTP SASL-auth (using username/password of the logged-in user) when sending each and every email message? Doing so, we would be able to distinguish between sending users (since they will be SASL-authenticated)and enforcevarious limitations based on their identity at the SMTP level (e.g. using postfwd). Currently, there is no way to tell who was the user who submitted a mail, since the senderaddress should not be the definitive criterion (while the client is always 127.0.0.1). I am aware of "Restrict Senders" plugin, which provides a solution, but -as mentioned in the plugin description- it is not the suggested one. Any advice regarding the issue will be appreciated. Thanks and regards, Nick ------------------------------------------------------------------------------ LogMeIn Central: Instant, anywhere, Remote PC access and management. Stay in control, update software, and manage PCs from one command center Diagnose problems and improve visibility into emerging IT issues Automate, monitor and manage. Do more in less time with Central http://p.sf.net/sfu/logmein12331_d2d ----- squirrelmail-users mailing list Posting guidelines: http://squirrelmail.org/postingguidelines List address: squirrelmail-users@xxxxxxxxxxxxxxxxxxxxx List archives: http://news.gmane.org/gmane.mail.squirrelmail.user List info (subscribe/unsubscribe/change options): https://lists.sourceforge.net/lists/listinfo/squirrelmail-users