diff --git a/README.md b/README.md
index a5d0586..6e8352a 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,7 @@ None
  * `postfix_smtpd_tls_cert_file` [default: `/etc/ssl/certs/ssl-cert-snakeoil.pem`]: Path to certificate file
  * `postfix_smtpd_tls_key_file` [default: `/etc/ssl/certs/ssl-cert-snakeoil.key`]: Path to key file
  * `postfix_raw_options` [default: `[]`]: List of lines (to pass extra (unsupported) configuration)
+ * `postfix_master_custom` [default: Debian default master.cf]: Dictionary of master.cf lines with service and type together as key, separated by space
 
 ## Dependencies
 
@@ -229,6 +230,20 @@ A simple example that shows how to add some raw config:
         policyd-spf_time_limit = 3600
 ```
 
+A simple example that shows how to disable bounce mails with master_custom:
+
+```yaml
+---
+- hosts: all
+  roles:
+    - postfix
+  vars:
+    postfix_master_custom:
+      bounce unix: '- - y - 0 discard'
+      defer unix: '- - y - 0 discard'
+      trace unix: '- - y - 0 discard'
+```
+
 #### License
 
 MIT
diff --git a/defaults/main.yml b/defaults/main.yml
index 35ab0df..8f4e66b 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -45,3 +45,43 @@ postfix_default_database_type: hash
 postfix_smtpd_tls_cert_file: /etc/ssl/certs/ssl-cert-snakeoil.pem
 postfix_smtpd_tls_key_file: /etc/ssl/private/ssl-cert-snakeoil.key
 postfix_raw_options: []
+postfix_master_custom: []
+postfix_master_default:
+  smtp inet: 'n - y - - smtpd'
+  pickup unix: 'n - y 60 1 pickup'
+  cleanup unix: 'n - y - 0 cleanup'
+  qmgr unix: 'n - n 300 1 qmgr'
+  tlsmgr unix: '- - y 1000? 1 tlsmgr'
+  rewrite unix: '- - y - - trivial-rewrite'
+  bounce unix: '- - y - 0 bounce'
+  defer unix: '- - y - 0 bounce'
+  trace unix: '- - y - 0 bounce'
+  verify unix: '- - y - 1 verify'
+  flush unix: 'n - y 1000? 0 flush'
+  proxymap unix: '- - n - - proxymap'
+  proxywrite unix: '- - n - 1 proxymap'
+  smtp unix: '- - y - - smtp'
+  relay unix: '- - y - - smtp'
+  showq unix: 'n - y - - showq'
+  error unix: '- - y - - error'
+  retry unix: '- - y - - error'
+  discard unix: '- - y - - discard'
+  local unix: '- n n - - local'
+  virtual unix: '- n n - - virtual'
+  lmtp unix: '- - y - - lmtp'
+  anvil unix: '- - y - 1 anvil'
+  scache unix: '- - y - 1 scache'
+  maildrop unix: '- n n - - pipe
+     flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}'
+  uucp unix: '- n n - - pipe
+     flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)'
+  ifmail unix: '- n n - - pipe
+     flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)'
+  bsmtp unix: '- n n - - pipe
+     flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient'
+  scalemail-backend unix: '- n n - 2 pipe
+     flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}'
+  mailman unix: '- n n - - pipe
+     flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
+     ${nexthop} ${user}'
+postfix_master: "{{ postfix_master_default | combine(postfix_master_custom) }}"
diff --git a/tasks/main.yml b/tasks/main.yml
index 0f74727..8e4d5d6 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -57,6 +57,19 @@
     - postfix
     - postfix-configuration
 
+- name: update mastercf file
+  template:
+    src: "{{ postfix_master_cf.lstrip('/') }}.j2"
+    dest: "{{ postfix_master_cf }}"
+    owner: root
+    group: root
+    mode: 0644
+  notify: restart postfix
+  tags:
+    - configuration
+    - postfix
+    - postfix-configuration
+
 - name: configure sasl username/password
   template:
     src: "{{ postfix_sasl_passwd_file.lstrip('/') }}.j2"
@@ -163,16 +176,12 @@
     - postfix-recipient-canonical-maps
 
 - name: configure transport maps
-  lineinfile:
+  template:
     dest: "{{ postfix_transport_maps_file }}"
-    regexp: '^{{ item.pattern | regex_escape }}.*'
-    line: '{{ item.pattern }} {{ item.result }}'
+    src: "{{ postfix_transport_maps_file.lstrip('/') }}.j2"
     owner: root
     group: root
     mode: 0644
-    create: true
-    state: present
-  with_items: "{{ postfix_transport_maps }}"
   notify:
     - postmap transport_maps
     - restart postfix
diff --git a/templates/etc/postfix/master.cf.j2 b/templates/etc/postfix/master.cf.j2
new file mode 100644
index 0000000..d919401
--- /dev/null
+++ b/templates/etc/postfix/master.cf.j2
@@ -0,0 +1,5 @@
+# {{ ansible_managed }}
+
+{% for item in postfix_master %}
+{{ item }} {{ postfix_master[item] }}
+{% endfor %}
diff --git a/templates/etc/postfix/transport_maps.j2 b/templates/etc/postfix/transport_maps.j2
new file mode 100644
index 0000000..1efd3f6
--- /dev/null
+++ b/templates/etc/postfix/transport_maps.j2
@@ -0,0 +1,6 @@
+{{ ansible_managed | comment }}
+
+{% for transport in postfix_transport_maps %}
+{{ transport.pattern }} {{ transport.result }}
+{% endfor %}
+
diff --git a/vars/main.yml b/vars/main.yml
index 050326f..1a4b650 100644
--- a/vars/main.yml
+++ b/vars/main.yml
@@ -7,6 +7,7 @@ postfix_debconf_selections:
    vtype: select
 
 postfix_main_cf: /etc/postfix/main.cf
+postfix_master_cf: /etc/postfix/master.cf
 postfix_mailname_file: /etc/mailname
 postfix_aliases_file: /etc/aliases
 postfix_virtual_aliases_file: /etc/postfix/virtual