Improve SMTP settings

.env.sample

@@ -46,6 +46,8 @@ SECRET_DB_PASSWORD_VERSION=v1
 #COMPOSE_FILE="$COMPOSE_FILE:compose.smtp.yml"
 #SMTP_HOST="mail.example.com"
 #MAIL_FROM="wordpress@example.com"
+#SMTP_USER="wordpress@example.com"  # optional, defaults to MAIL_FROM
+#SMTP_OVERRIDE_FROM=on  # force "From" to MAIL_FROM, usually necessary
 #SMTP_PORT=587
 #SMTP_AUTH=on
 #SMTP_TLS=on

abra.sh

@@ -1,7 +1,7 @@
 export PHP_UPLOADS_CONF_VERSION=v3
 export ENTRYPOINT_CONF_VERSION=v4
 export ENTRYPOINT_MAILRELAY_CONF_VERSION=v2
-export MSMTP_CONF_VERSION=v3
+export MSMTP_CONF_VERSION=v4
 
 wp() {
     su -p www-data -s /bin/bash -c "/usr/local/bin/wp $@"

compose.smtp.yml

@@ -6,11 +6,12 @@ services:
     secrets:
       - smtp_password
     environment:
-      - SMTP_HOST=${SMTP_HOST}
+      - SMTP_HOST
       - SMTP_PORT=${SMTP_PORT:-25}
-      - SMTP_AUTH=${SMTP_AUTH}
+      - SMTP_AUTH
-      - SMTP_TLS=${SMTP_TLS}
+      - SMTP_TLS
-      - MAIL_FROM=${MAIL_FROM}
+      - MAIL_FROM
+      - SMTP_OVERRIDE_FROM
 
 secrets:
   smtp_password:

msmtp.conf.tmpl

@@ -1,9 +1,13 @@
 account default
 host {{ env "SMTP_HOST" }}
 from {{ env "MAIL_FROM" }}
-user {{ env "MAIL_FROM" }}
+user {{ or (env "SMTP_USER") (env "MAIL_FROM") }}
 port {{ env "SMTP_PORT" }}
 
+{{ if eq (env "SMTP_OVERRIDE_FROM") "on" }}
+set_from_header on
+{{ end }}
+
 {{ if eq (env "SMTP_AUTH") "on" }}
 auth {{ env "SMTP_AUTH" }}
 passwordeval "cat /run/secrets/smtp_password"