Copy postfix queue to another server

backup_pf_queue.sh

# http://postfix.1071664.n5.nabble.com/stop-receiving-mail-but-keep-processing-mail-in-queue-td92652.html#a92762
 # : on old server 
    service pf_outb_deliver stop 
    
    
    export MAIL_CONFIG=/opt/config/pf_outb_deliver 
    name=$(postconf -xh syslog_name) 
    
    postsuper -h ALL 
    cd $(postconf -xh queue_directory) 
    umask 077 
    t=$(mktemp "/tmp/${name}-hold.tgz.XXXXXX") 
    tar czvf "$t" hold && mv "$t" "/tmp/${name}-hold.tgz" 
    service pf_outb_deliver start 
    echo Done. Saved backup in $t
    

restore_pf_queue.sh

  # : on new server 
    serivce pf_outb_deliver stop 

    # : per Postfix instance 
    export MAIL_CONFIG=/opt/config/pf_outb_deliver 
    export name=$(postconf -xh syslog_name) 

    export qdir=$(postconf -xh queue_directory) 
    export mail_owner=$(postconf -xh mail_owner) 
    postsuper -H ALL 
    (cd "${qdir}"; tar xzvf -) < "${name}-hold.tgz" 
    chown -R "${mail_owner}" "${qdir}/hold" 

    echo Repeating "postsuper -s" until all structires are reconstructed 
    while postsuper -s ; do 
     sleep 1
    done

    echo release queue files from merged "hold" queue 
    postsuper -H ALL 

    echo  Make sure queue content looks OK 
    mailq 

    service pf_outb_deliver start 

suspend_postfix.sh

#How would we set Postfix to stop accepting incoming mail yet keep 
#processing any queued mail? 

export MAIL_CONFIG=/opt/config/pf_outb_deliver 



#postconf -e "inet_interfaces = loopback-only"
#service pf_outb_deliver stop 
#service pf_outb_deliver start

#A less invasive change is: 

postconf -e "master_service_disable = inet" 
service pf_outb_deliver reload