Try out busybox-syslog

build/Dockerfile.ubuntu

@@ -25,6 +25,7 @@ RUN apt remove -y nano* exim*; \
     && apt dist-upgrade -y \
     && bash -c "echo \"postfix postfix/main_mailer_type string 'Internet Site'\" | debconf-set-selections" \
     && apt install -y \
+        busybox-syslogd \
         ca-certificates \
         git wget bind9-host acl dbconfig-no-thanks at \
         nginx \

build/run/docker-entrypoint/entrypoint.sh

@@ -22,7 +22,8 @@ ${reset}"
 }
 
 # Reset logs
-echo | tee /var/log/dovecot.log /var/log/postfix.log /usr/share/webapps/roundcube/logs/errors.log >/dev/null
+echo | tee /var/log/maillog /usr/share/webapps/roundcube/logs/errors.log >/dev/null
+syslogd -O /var/log/maillog
 
 # Run all scripts in init folder
 for file in /docker-entrypoint/init.d/*.sh
@@ -36,4 +37,4 @@ postfix reload &&
 echo -e "\n\e[1;32mMail service is ready\e[0m\n"
 
 # Monitor log
-tail -f /var/log/dovecot.log /var/log/postfix.log /usr/share/webapps/roundcube/logs/errors.log
+tail -f /var/log/maillog /usr/share/webapps/roundcube/logs/errors.log

build/run/installer.sh

@@ -67,8 +67,8 @@ postconf -e "smtp_tls_mandatory_protocols = >=TLSv1.2"
 postconf -e "smtpd_tls_protocols = >=TLSv1.2"
 postconf -e "smtp_tls_protocols = >=TLSv1.2"
 
-# Logging
-postconf -e "maillog_file = /var/log/postfix.log"
+# # Logging
+# postconf -e "maillog_file = /var/log/postfix.log"
 
 # Virtual mailboxes
 postconf -e "mailbox_transport = lmtp:unix:private/dovecot-lmtp"
@@ -178,8 +178,8 @@ tee -a /etc/dovecot/dovecot.conf >/dev/null <<- dovecot.conf
 protocols = imap lmtp
 dovecot.conf
 
-# Logging
-echo "log_path = /var/log/dovecot.log" >/etc/dovecot/conf.d/10-logging.conf
+# # Logging
+# echo "log_path = /var/log/dovecot.log" >/etc/dovecot/conf.d/10-logging.conf
 
 # 10-auth.conf
 sed '/include auth-sql.conf.ext\|disable_plaintext_auth =\|auth_username_format =\|auth_mechanisms =\|auth_default_realm =\|include auth-system.conf.ext/d' \