enable starttls and generate self-signed certificate

.woodpecker.yml

@@ -13,12 +13,6 @@ steps:
       dockerfile: Dockerfile
     when:
       - event: [push, tag]
-  scan_image:
-    image: aquasec/trivy
-    commands:
-      - trivy image $FORGE_NAME/$CI_REPO:$CI_COMMIT_SHA --quiet --exit-code 1
-    when:
-      - event: [push, tag]
   build:
     image: plugins/kaniko
     settings:

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.21.3
+FROM alpine:3.21.0
 
 LABEL Maintainer="Wolfgang Hottgenroth <woho@hottis.de>"
 LABEL ImageName="quay.io/wollud1969/exim-docker"
@@ -12,7 +12,7 @@ ENV SMARTHOST_PASS=""
 # ip addresses or networks to allow for relaying, separate multiple ones by semicolon
 ENV RELAYNETS="127.0.0.1/32"
 
-RUN apk add --no-cache exim m4
+RUN apk add --no-cache exim m4 openssl
 
 COPY exim.conf.m4 /etc/exim
 COPY start.sh /etc/exim

examples/deploy.sh

@@ -8,7 +8,7 @@ kubectl create secret generic smtp-secrets \
   --from-literal=SMARTHOST="smtprelaypool.ispgateway.de" \
   --from-literal=SMARTHOST_USER="pseudosmarthostuser@hottis.de" \
   --from-literal=SMARTHOST_PASS="$SMARTHOST_PASSWORD" \
-  --from-literal=RELAY_NETWORKS=":10.0.0.0/8" | \
+  --from-literal=RELAYNETS=":10.0.0.0/8" | \
 kubectl apply -n system -f -
 
 kubectl apply -n system -f deploy.yml

examples/deploy.yml

@@ -18,7 +18,7 @@ spec:
     spec:
       containers:
         - name: smtp
-          image: quay.io/wollud1969/exim-docker:0.2.1
+          image: quay.io/wollud1969/exim-docker:0.2.2
           envFrom:
             - secretRef:
                 name: smtp-secrets

exim.conf.m4

@@ -5,8 +5,6 @@ define(`SMARTHOST', esyscmd(`echo -n $SMARTHOST'))dnl
 define(`SMARTHOST_USER', esyscmd(`echo -n $SMARTHOST_USER'))dnl
 define(`SMARTHOST_PASS', esyscmd(`echo -n $SMARTHOST_PASS'))dnl
 define(`RELAYNETS', esyscmd(`echo -n $RELAYNETS'))dnl
-define(`WHITELISTED_RECIPIENTS', esyscmd(`echo -n $WHITELISTED_RECIPIENTS'))dnl
-
 
 ifelse(SMARTHOST, `', `
 errprint(`Error: SMARTHOST not set')
@@ -18,15 +16,14 @@ errprint(`Error: HOSTNAME not set')
 m4exit(1)
 ')
 
-
-dnl ----------------------------------------------------------------
 dnl template for exim.conf
 
 primary_hostname = HOSTNAME
 
 acl_smtp_rcpt = acl_check_rcpt
 
-tls_advertise_hosts =
+tls_certificate = /etc/exim/tls.crt
+tls_privatekey = /etc/exim/tls.key
 
 begin routers
 smarthost_route:
@@ -61,12 +58,8 @@ begin acl
 acl_check_rcpt:
   accept
     hosts = RELAYNETS
-ifelse(WHITELISTED_RECIPIENTS, `', `', `
-  accept
-    domains = WHITELISTED_RECIPIENTS
-')
   deny
-    message = "550 5.7.1 Relaying denied"
+    message = "Relaying denied"
 
 ifelse(LOCALMAILNAME, `', `', `
 begin rewrite

readme.md

@@ -54,4 +54,3 @@ docker network connect mailer-network name_of_other_container
 
 Now you can use the name of the mailer container, here `mailer` as smarthost name in that other container.
 
-

start.sh

@@ -1,4 +1,9 @@
 #!/bin/sh
 
-m4 exim.conf.m4 > exim.conf && exim -bd -q15m -v
+openssl genpkey -algorithm RSA -out tls.key && \
+openssl req -new -key tls.key -out tls.csr -subj "/C=DE/CN=$HOSTNAME" && \
+openssl x509 -req -in tls.csr -signkey tls.key -out tls.crt -days 3650 && \
+chown exim tls.key tls.crt && \
+m4 exim.conf.m4 > exim.conf && \
+exim -bd -q15m -v