add some mail rules

manifests/rules/out/imap.pp

+# outgoing imap
+class firewall::rules::out::imap {
+  include firewall
+  if $firewall::use_nftables {
+    include nftables::rules::out::imap
+  } else {
+    include shorewall::rules::out::imap
+  }
+}

manifests/rules/out/pop3.pp

+# outgoing pop3
+class firewall::rules::out::pop3 {
+  include firewall
+  if $firewall::use_nftables {
+    include nftables::rules::out::pop3
+  } else {
+    include shorewall::rules::out::pop3
+  }
+}

manifests/rules/out/smtp.pp

+# outgoing smtp
 class firewall::rules::out::smtp {
   include firewall
   if $firewall::use_nftables {

manifests/rules/out/smtp_client.pp

+# outgoing smtp client
+class firewall::rules::out::smtp_client {
+  include firewall
+  if $firewall::use_nftables {
+    include nftables::rules::out::smtp_client
+  } else {
+    include shorewall::rules::out::smtps
+    include shorewall::rules::out::smtp_submit
+  }
+}