As a bit of extra knowledge, if you don't know the exact package name, from the CLI: aptitude search libasl That will return a list of any packages that you have in the cache that have libasl in them. Then hit it with apt-get install <package name>. If you don't see the package you're looking for, make sure you run: apt-get update Then retry the search. Matt Unger From: tclug-list-bounces at mn-linux.org [mailto:tclug-list-bounces at mn-linux.org] On Behalf Of Smith, Craig A Sent: Thursday, March 11, 2010 6:25 PM To: tclug-list at mn-linux.org Subject: [tclug-list] Postfix, Comcast, Relayhost and port 587 I run a hobby server on a Comcast residential connection. A number of years ago, I noticed larger organizations (Gmail, etc) began rejecting email from dynamic ip. The solution was a "smart host" to relay email. Comcast would accept connections on port 25 and forward from their well-know (unblocked) ip address. Here's the line I added to /etc/postfix/main.cf that made it work. relayhost = smtp.comcast.net Last year, there was discussion on this list about Comcast blocking port 25. I was unaffected at that time. http://archives.mn-linux.org/pipermail/tclug-list/2009-February/thread.h tml However, last month on or after Feb 8, 2010, Comcast stopped accepting my port 25 connections. $ telnet smtp.comcast.net 25 Trying 76.96.30.117... telnet: Unable to connect to remote host: Connection timed out I called Comcast and they said "that's right, use port 587." I can telnet to port 587 , but I believe this requires authentication, presumably with my Comcast credentials. I've reconfigure postfix for port 587 per http://www.kclug.org/pipermail/kclug/2008-February/032558.html and setup SMTP Authentication per http://www.freelock.com/kb/postfix-relayhost but I'm stuck on the last step: # urpmi --media main libsasl2-plug-login libsasl2-plug-plain bash: urpmi: command not found Can someone supply the magical apt-get incantation to get me started? I'm running postfix 2.3.8 on Debian and can live with only out-going mail. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mailman.mn-linux.org/pipermail/tclug-list/attachments/20100312/ddd24dd9/attachment.htm