Postfix How To Change Sending IP Address To Specific IP Binding or Interface

I thought I'd post this becuase there is some bad information out there.  Some guides tell you to edit /etc/postfix/master.cf (-o smtp_bind_address=) but this doesn't work.  The same guide also says if you don't change it there you end up changing the listening IP/bind interface which is also not true.

Here is a simple and effective way to change Postfix's sending/binding/outgoing IP address (very important for reverse DNS and so mail servers don't block you):

vi /etc/postfix/main.cf

#add this option

smtp_bind_address=192.168.5.80

*Obviously change the 192.168.5.80 to the outgoing address you want to use for Postfix


Tags:

postfix, ip, binding, interfacei, becuase, guides, edit, etc, cf, smtp_bind_address, doesn, bind, interface, outgoing, dns, servers, vi,

Latest Articles

  • Linux Ubuntu Cannot Print Large Images
  • Cannot Print PDF Solution and Howto Resize
  • Linux Console Login Screen TTY Change Message
  • Apache Cannot Start Listening Already on 0.0.0.0
  • MySQL Bash Query to pipe input directly without using heredoc trick
  • CentOS 6 and 7 / RHEL Persistent DHCP Solution
  • Debian Ubuntu Mint rc-local service startup error solution rc-local.service: Failed at step EXEC spawning /etc/rc.local: Exec format error
  • MySQL Cheatsheet Guide and Tutorial
  • bash script kill whois or other command that is running for too long
  • Linux tftp listens on all interfaces and IPs by DEFAULT Security Risk Hole Solution
  • python import docx error
  • Cisco Unified Communications Manager Express Cheatsheet CUCME CME
  • Linux Ubuntu Debian Missing privilege separation directory: /var/run/sshd
  • bash how to count the number of columns or words in a line
  • bash if statement how to test program output without assigning to variable
  • RTNETLINK answers: Network is unreachable
  • Centos 7 how to save iptables rules like Centos 6
  • nfs tuning maximum amount of connections
  • qemu-kvm error "Could not initialize SDL(No available video device) - exiting"
  • Centos 7 tftpd will not work with selinux enabled