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Latest revision as of 17:17, 15 July 2010

Adding a Second Postfix Instance on one Server

Base reference: http://advosys.ca/papers/email/58-postfix-instance.html

• Add an ip address to the server (e.g. 1.2.3.4)

ip addr add 1.2.3.4/8 dev eth0 # or see /etc/network/interfaces

• Copy the /etc/postfix directory and all files

rsync -av /etc/postfix/ /data/postfix/conf

• Create an additional spool directory

mkdir /data/postfix/spool && rsync -av /var/spool/postfix/{dev,etc,lib} /data/postfix/spool/

• Create an additional data directory

mkdir /data/postfix/data; chown postfix.postfix /data/postfix/data

• Edit the config files
  • /data/postfix/conf/main.cf

inet_interfaces = 1.2.3.4
smtp_bind_address = 1.2.3.4
queue_directory = /data/postfix/spool/
data_directory = /data/postfix/data/

• • /etc/postfix/main.cf (default configuration file)

alternate_config_directories = /data/postfix/conf/

• use postfix-install to create missing files and set/update the permissions

postfix post-install config_directory=/data/postfix/conf/ set-permissions upgrade-configuration create-missing

• check & start

postfix -c /data/postfix/conf/ check
postfix -c /data/postfix/conf/ start