Frequently Asked Questions About Linux / UNIX » restart postfix http://www.cyberciti.biz/faq Every answer asks a more beautiful question. Fri, 03 Feb 2012 22:38:32 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Start / Stop / Restart Postfix Mail Serverhttp://www.cyberciti.biz/faq/linux-unix-start-stop-restart-postfix/ http://www.cyberciti.biz/faq/linux-unix-start-stop-restart-postfix/#comments Thu, 03 Dec 2009 18:47:17 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=9480 How do I start / stop / restart my postfix mail server under Linux or UNIX operating systems?]]> http://www.cyberciti.biz/faq/linux-unix-start-stop-restart-postfix/feed/ 2 Postfix Forward Email To Another Email Accounthttp://www.cyberciti.biz/faq/linux-unix-bsd-postfix-forward-email-to-another-account/ http://www.cyberciti.biz/faq/linux-unix-bsd-postfix-forward-email-to-another-account/#comments Wed, 03 Jun 2009 23:36:03 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=3913 I've multiple virtual domain hosted on CentOS Postfix server. How do I forward selected virtual domain email to yahoo / gmail or other email account using Postfix email server?]]> http://www.cyberciti.biz/faq/linux-unix-bsd-postfix-forward-email-to-another-account/feed/ 10 Postfix Hide Client (MUA) System IP Address / Hostnamehttp://www.cyberciti.biz/faq/postfix-remove-hide-hostnames-ip-addresses/ http://www.cyberciti.biz/faq/postfix-remove-hide-hostnames-ip-addresses/#comments Mon, 01 Jun 2009 00:03:45 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=3870 I've central mail server gateway. All of our internal systems through this box. How do I remove or hide the hostnames and IP addresses of our internal systems from the messages headers before they go out to other users for security purpose?]]> http://www.cyberciti.biz/faq/postfix-remove-hide-hostnames-ip-addresses/feed/ 2 SPAMHAUS BLOCKLIST ADDRESS IS WRONG MUST FIX Error and Solutionhttp://www.cyberciti.biz/faq/spamhaus-blocklist-address-is-wrong-must-fix/ http://www.cyberciti.biz/faq/spamhaus-blocklist-address-is-wrong-must-fix/#comments Thu, 07 May 2009 21:30:46 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=3749 I've configured RBL for my postfix based mail server and I'm getting an error that read as follows:

May 3 04:35:37 mx02 postfix/smtpd[10956]: NOQUEUE: reject: RCPT from ant251.neoplus.adsl.tpnet.pl[83.26.101.251]: 554 5.7.1 Service unavailable; Client host [83.26.101.251] blocked using xen.spamhaus.org; SPAMHAUS BLOCKLIST ADDRESS IS WRONG MUST FIX; from= to= proto=ESMTP helo=


How do I fix this problem?]]> http://www.cyberciti.biz/faq/spamhaus-blocklist-address-is-wrong-must-fix/feed/ 1 Postfix mail for domain.com loops back to myself Error and Solutionhttp://www.cyberciti.biz/faq/postfix-mail-for-domaincom-loops-back-to-myself-error-and-solution/ http://www.cyberciti.biz/faq/postfix-mail-for-domaincom-loops-back-to-myself-error-and-solution/#comments Fri, 01 May 2009 04:32:43 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=3722 I can send and receive mail using user@example.com, but system generated emails such as root@mail.example.com bounce backup with an error:
May 1 03:14:52 mail postfix/smtp[62798]: 23CA4BD6B40: to=, relay=none, delay=0.01, delays=0/0/0/0, dsn=5.4.6, status=bounced (mail for mail.example.com loops back to myself)
How do I fix this error?]]> http://www.cyberciti.biz/faq/postfix-mail-for-domaincom-loops-back-to-myself-error-and-solution/feed/ 1 Postfix Backup MX eMail Server Anti-Spam Configurationhttp://www.cyberciti.biz/faq/postfix-backup-mx-server-anti-spam/ http://www.cyberciti.biz/faq/postfix-backup-mx-server-anti-spam/#comments Tue, 28 Apr 2009 21:40:47 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=3694 According to RFC2821 the lowest-numbered records are the most preferred MX for domain. So I've a target Postfix backup server to keep the messages in a queue waiting for the primary server to become available. This ensures that if my primary MX goes down I do not loss any emails. However, spammers are connecting to my backup MX to avoid anti spam filters that are running on the primary MX server. This also hides their real IP from my primary MX. How do I configure anti-spam for my backup RHEL / CentOS 5.3 based Postfix mx server?]]> http://www.cyberciti.biz/faq/postfix-backup-mx-server-anti-spam/feed/ 13 Postfix block PDF or ZIP files attachmentshttp://www.cyberciti.biz/faq/howto-postfix-block-pdf-zip-file/ http://www.cyberciti.biz/faq/howto-postfix-block-pdf-zip-file/#comments Fri, 10 Aug 2007 11:11:18 +0000 Vivek Gite http://www.cyberciti.biz/faq/howto-postfix-block-pdf-zip-file/ http://www.cyberciti.biz/faq/howto-postfix-block-pdf-zip-file/feed/ 1