diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
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+Tool to copy local configuration files to portal of [DFN-MailSupport](https://portal.mailsupport.dfn.de/)
+
+# Use case
+
+Currently, it’s only possible to edit filter lists via the Web interface the DFN-MailSupport portal. As these are text files, we would like to have these under revision control. To achieve this, the solution here is to copy the file content of the filter lists from the DFN-MailSupport portal to a local directory, and, in our case, git is used as VCS.
+
+# Build
+
+Build with
+
+    $ cargo build --release
+
+The binary is placed as `target/release/dfnmscp`.
+
+# Example
+
+`misc` contains the script `validate.pl` and `Makefile` as used in the MPIMG
+environment.
+
+Please find `blacklist_client` as an example below.
+
+    $ head blacklist_client
+    # DO NOT EDIT via DFN-MailSupport Portal
+    #
+    # maintained in /project/mx/dfn/ as blacklist_client
+    
+    some.domain.example.net (#c1)
+    […]
+
+# Support
+
+Feel free to create an issue or to send an email to helpdesk@.
diff --git a/misc/Makefile b/misc/Makefile
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+++ b/misc/Makefile
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+DFNMSCP=/project/mx/etc/dfn/dfnmscp -u buczek@molgen.mpg.de -c /project/mx/etc/dfn/.dfnpw
+
+.PHONY: default
+default: put-if
+
+.PHONY: put-if
+put-if: .blacklist_sender.uploaded .spamassassin-rules.uploaded .blacklist_client.uploaded
+put-if: .blacklist_header_rx.uploaded
+put-if: .blacklist_sender_rx.uploaded
+put-if: .blacklist_client_cidr.uploaded
+put-if: .blacklist_helo.uploaded
+
+.blacklist_sender.uploaded: blacklist_sender
+	./validate.pl blacklist_sender
+	${DFNMSCP} put blacklist_sender postfix/124-1/blacklist_sender && touch $@
+
+.spamassassin-rules.uploaded: spamassassin-rules
+	${DFNMSCP} put spamassassin-rules spamassassin/124-1/rules && touch $@
+
+.blacklist_client.uploaded: blacklist_client
+	./validate.pl blacklist_client
+	${DFNMSCP} put blacklist_client postfix/124-1/blacklist_client && touch $@
+
+.blacklist_header_rx.uploaded: blacklist_header_rx
+	./validate.pl blacklist_header_rx
+	${DFNMSCP} put blacklist_header_rx postfix/124-1/blacklist_header_rx && touch $@
+
+.blacklist_sender_rx.uploaded: blacklist_sender_rx
+	./validate.pl blacklist_sender_rx
+	${DFNMSCP} put blacklist_sender_rx postfix/124-1/blacklist_sender_rx && touch $@
+
+.blacklist_client_cidr.uploaded: blacklist_client_cidr
+	./validate.pl blacklist_client_cidr
+	${DFNMSCP} put blacklist_client_cidr postfix/124-1/blacklist_client_cidr && touch $@
+
+.blacklist_helo.uploaded: blacklist_helo
+	./validate.pl blacklist_helo
+	${DFNMSCP} put blacklist_helo postfix/124-1/blacklist_helo && touch $@
+
+test:
+	${DFNMSCP} test
+
+.PHONY: get-blacklist-sender
+get-blacklist-sender:
+	${DFNMSCP} get postfix/124-1/blacklist_sender blacklist_sender
+
+.PHONY: get-blacklist-sender-rx
+get-blacklist-sender-rx:
+	${DFNMSCP} get postfix/124-1/blacklist_sender_rx blacklist_sender_rx
+
+.PHONY: get-spamassassin-rules
+get-spamassassin-rules:
+	${DFNMSCP} get spamassassin/124-1/rules spamassassin-rules
+
+.PHONY: get-blacklist_client
+get-blacklist_client:
+	${DFNMSCP} get postfix/124-1/blacklist_client blacklist_client
+
+.PHONY: get-blacklist_header_rx
+get-blacklist_header_rx:
+	${DFNMSCP} get postfix/124-1/blacklist_header_rx blacklist_header_rx
+
+.PHONY: get-blacklist_client_cidr
+get-blacklist_client_cidr:
+	${DFNMSCP} get postfix/124-1/blacklist_client_cidr blacklist_client_cidr
+
+.PHONY: get-blacklist_helo
+get-blacklist_helo:
+	${DFNMSCP} get postfix/124-1/blacklist_helo blacklist_helo
diff --git a/misc/validate.pl b/misc/validate.pl
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+++ b/misc/validate.pl
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+#! /usr/bin/perl
+use strict;
+use warnings;
+
+sub do_blacklist {
+    my ($filename, $tag, $is_regexp) = @_;
+    open my $in, '<', $filename or die "$filename: $!\n";
+    my $errors = 0;
+    my $last_id = 0;
+    while (<$in>) {
+        chomp;
+        /^#/ and next;
+        /\S/ or next;
+        my $re;
+        if ($is_regexp) {
+            $re = qr"^/(.+)/ REJECT \(#$tag(\d+)\)$";
+        } else {
+            $re = qr"^(\S+) \(#$tag(\d+)\)$";
+        }
+        if (my ($inner, $id) = $_ =~ $re) {
+            if ($is_regexp) {
+                eval {
+                    my $test = qr/$inner/;
+                };
+                if ($@) {
+                    $@ =~ s / at \S+ line .+\n$//;
+                    warn "$filename: $. : $@\n";
+                    $errors++;
+                }
+            }
+            if ($id > $last_id) {
+                $last_id = $id;
+            } else {
+                $errors++;
+                warn "$filename:$. : ident not increasing: $_\n";
+            }
+            next;
+        }
+
+        warn "$filename:$. : bad format: $_\n";
+        $errors++;
+    }
+    exit 1 if $errors;
+}
+
+
+@ARGV == 1 or die "usage: $0 filename\n";
+my ($filename) = @ARGV;
+if ($filename eq "blacklist_header_rx") {
+    do_blacklist($filename, 'h', 1)
+} elsif ($filename eq 'blacklist_sender_rx') {
+    do_blacklist($filename, 'sx', 1)
+} elsif ($filename eq 'blacklist_sender') {
+    do_blacklist($filename, 's', 0)
+} elsif ($filename eq 'blacklist_client') {
+    do_blacklist($filename, 'c', 0)
+} elsif ($filename eq 'blacklist_client_cidr') {
+    warn "todo\n";
+} elsif ($filename eq 'blacklist_helo') {
+    do_blacklist($filename, 'he', 0)
+} else {
+    die "unknown filename: $filename\n";
+}