Cleanup Received headers only on outgoing mail

Delta Chat does not follow redirects,
so it breaks old QR codes printed on paper
and published on various web pages.

chatmaild/pyproject.toml

@@ -8,7 +8,7 @@ version = "0.2"
 dependencies = [
   "aiosmtpd",
   "iniconfig",
-  "deltachat-rpc-server",
+  "deltachat-rpc-server==1.131.4",
   "deltachat-rpc-client",
 ]
 

cmdeploy/src/cmdeploy/nginx/nginx.conf.j2

@@ -58,8 +58,19 @@ http {
 		}
 
 		# Old URL for compatibility with e.g. printed QR codes.
+		#
+		# Copy-paste instead of redirect to /new
+		# because Delta Chat core does not follow redirects.
+		#
+		# Redirects are only for browsers.
 		location /cgi-bin/newemail.py {
-			return 301 /new;
+			if ($request_method = GET) {
+				return 301 dcaccount:https://{{ config.domain_name }}/new;
+			}
+
+			fastcgi_pass unix:/run/fcgiwrap.socket;
+			include /etc/nginx/fastcgi_params;
+			fastcgi_param SCRIPT_FILENAME /usr/lib/cgi-bin/newemail.py;
 		}
 	}
 

cmdeploy/src/cmdeploy/postfix/main.cf.j2

@@ -48,5 +48,3 @@ virtual_mailbox_domains = {{ config.mail_domain }}
 
 smtpd_milters = inet:127.0.0.1:11332
 non_smtpd_milters = $smtpd_milters
-
-header_checks = regexp:/etc/postfix/submission_header_cleanup

cmdeploy/src/cmdeploy/postfix/master.cf.j2

@@ -34,6 +34,7 @@ submission inet n       -       y       -       -       smtpd
   -o milter_macro_daemon_name=ORIGINATING
   -o smtpd_client_connection_count_limit=1000
   -o smtpd_proxy_filter=127.0.0.1:{{ config.filtermail_smtp_port }}
+  -o cleanup_service_name=authclean
 smtps     inet  n       -       y       -       -       smtpd
   -o syslog_name=postfix/smtps
   -o smtpd_tls_wrappermode=yes
@@ -50,6 +51,7 @@ smtps     inet  n       -       y       -       -       smtpd
   -o smtpd_client_connection_count_limit=1000
   -o milter_macro_daemon_name=ORIGINATING
   -o smtpd_proxy_filter=127.0.0.1:{{ config.filtermail_smtp_port }}
+  -o cleanup_service_name=authclean
 #628       inet  n       -       y       -       -       qmqpd
 pickup    unix  n       -       y       60      1       pickup
 cleanup   unix  n       -       y       -       0       cleanup
@@ -80,3 +82,12 @@ filter    unix -        n       n       -       -       lmtp
 # Local SMTP server for reinjecting filered mail.
 localhost:{{ config.postfix_reinject_port }} inet  n       -       n       -       10      smtpd
   -o syslog_name=postfix/reinject
+
+# Cleanup `Received` headers for authenticated mail
+# to avoid leaking client IP.
+#
+# We do not do this for received mails
+# as this will break DKIM signatures
+# if `Received` header is signed.
+authclean unix  n       -       -       -       0       cleanup
+  -o header_checks=regexp:/etc/postfix/submission_header_cleanup