Postfix

back-scatter
Hello, User(a)domain.com was receiving tons of backscatter mail, I successfully block backscatter email with the following header_checks in main.cf. however, I noticed in the logs that even genuine messages with header "Undelivered Mail Returned to Sender" are being block. Do you have any suggestions how to solv... 28 Apr 2010 14:01

Email persisted in deferred queue
Hi, I tried to configure amavisd-new(as content filter) with my postfix. But it was failing so I reverted my changes from postfix main.cf But now I can see 19 deferred mails and they are retried again and again and again put in to deferred queue. Step where delivery fails is at amavisd end. As I have disab... 28 Apr 2010 14:01

Client Access Reject List
I have a /etc/postfix/client_access file which holds IP's are known clients that refuse to stop sending my junk. I submit the IP in the file as follows: 68.69.110.81 REJECT executiveonlinelearning.com My question is as the list grows in length, is it correct to be able to identify the domain / sende... 28 Apr 2010 12:52

false positives
Hi guys, I don't know if I should ask this here or in spamassassin forum. I am running postfix-2.1.5 and I have employed spamassassin-3.0.1 (via amavisd-new) to check for spams. Based on scores, some legitimate emails get marked as spam and get quarantined. I want to know how to resend those emails. Thanks, Mutasho... 28 Apr 2010 10:35

'Domain not found' errors after Ubuntu upgrade
After a large upgrade of many packages on Ubuntu Karmic, postfix has stopped working properly. Symptoms: lost of postfix/smtpd[5922]: warning: 224.90.55.65.bl.spamcop.net: RBL lookup error: Host or domain name not found. Name service error for name=224.90.55.65..bl.spamcop.net type=A: Host not found, try again ... 28 Apr 2010 05:03

Postfix logging to syslog
On Tue, 27 Apr 2010, N. Yaakov Ziskind wrote: Sahil Tandon wrote (on Tue, Apr 27, 2010 at 11:23:22PM -0400): Assuming you did not make any mistakes while editing syslog.conf, did you restart syslogd(8) after making the changes? Postfix simply logs to the mail facility; how syslogd(8) handles this is... 3 May 2010 20:56

Design: end_of_header_checks support
On Fri, Apr 16, 2010 at 9:44 PM, Wietse Venema <wietse(a)porcupine.org> wrote: [..] This is an attempt to describe what it would take to make things such as header_checks independent of message content order. This would make multi-header checks possible as a side effect. [...] Hi Wietse, Have a cha... 27 Apr 2010 20:12

Ignore relay_recipient_maps setting for sending servers frommynetworks
On 4/27/2010 8:51 AM, Harakiri wrote: I have postfix relay server, which relays messages from the internet to an internal mailserver, but it should only expect messages to known internal recipients. However, there is one external server which is allowed to sent to users which are not defined in the recipient m... 27 Apr 2010 11:02

Ignore relay_recipient_maps setting for sending servers from mynetworks
I have postfix relay server, which relays messages from the internet to an internal mailserver, but it should only expect messages to known internal recipients. However, there is one external server which is allowed to sent to users which are not defined in the recipient maps (i.e. group addresses). I tried to put ... 27 Apr 2010 09:54

forward based on message size
Hi, I am looking for a way to not forward messages with a size bigger than xxxxxx. Details : My postfix server forwards (via aliases) emails received for sales(a)domain.com to a list of internal users plus some blackberry addresses. But blackberry servers limits message size to 8388608 so bigger messages are u... 27 Apr 2010 09:54