Hans du Plooy wrote:
I am in charge of a postfix box which acts as a antivirus/antispam relay and smarthost for an exchange 2000 server sitting behind it. For some reason exchange is having trouble sending through it, and I just want to be sure that the problem is not on my side.
Here's what my logs say. Firstly, I get plenty of these:
Aug 18 13:47:11 post postfix/smtpd[19885]: connect from srv-mail.example.com[192.168.3.3] Aug 18 13:47:11 post postfix/smtpd[19885]: disconnect from srv-mail.example.com[192.168.3.3]
What does the exchange log say about this connection? Have you tried to telnet to your postfix box from the exchange server to observe what happens? Any kind of firewall between your servers or running on either of these servers? If so, what does their log say about this?
Aug 18 00:21:28 post postfix/smtpd[11364]: connect from srv-mail.example.com[192.168.3.3] Aug 18 00:21:28 post postfix/smtpd[11364]: B8926100ED: client=srv-mail.example.com[192.168.3.3] Aug 18 00:26:28 post postfix/smtpd[11364]: timeout after DATA from srv-mail.example.com[192.168.3.3] Aug 18 00:26:28 post postfix/smtpd[11364]: disconnect from srv-mail.example.com[192.168.3.3]
This does look like a network problem. Firewalls, dropped packages, too many open connections...
main.cf: queue_directory = /var/spool/postfix inet_interfaces = all
it the ip address of your postfix server in the same network as your exchange server?
mydestination = $myhostname,localhost.$mydomain,$mydomain, relevant.domains
Okay, this resolves to "mail.example.com localhost.example.com, example.com" What the heck is "relevant.domains"?
smtpd_sender_restrictions = hash:/etc/postfix/access
What is the content of that file? If necessary enable verbose logging (log files are VERY detailed) in master.cf by adding " -v" to the smtpd line. It might also help to record the network communication with ethereal or tcpdump. Sandy -- List replies only please! Please address PMs to: news-reply (@) japantest (.) homelinux (.) com