diff --git a/src/mailsrv/assets/bin/mkvirt b/src/mailsrv/assets/bin/mkvirt
index 21237ff..be82318 100755
--- a/src/mailsrv/assets/bin/mkvirt
+++ b/src/mailsrv/assets/bin/mkvirt
@@ -1,9 +1,18 @@
 #!/bin/sh
 
+set -e
+
+# make self-referential users list
+# this is needed for the reject_sender_login_mismatch restriction to work,
+# otherwise users cannot send emails as their own address
+cd /vol/db/aliases.d
+echo "# This file is autogenerated by mkvirt. Don't edit it manually." > self.list
+cat /vol/db/users | cut -d':' -f1 | perl -pe 's/(.*)/\1\@brbytes.org \1\n\1\@mail.brbytes.org \1/' >> self.list
+
 cd /etc/postfix
 
 # do users
-cat /vol/db/users | cut -d':' -f1 | perl -pe 's/(.*)/\1 ./'
+cat /vol/db/users | cut -d':' -f1 | perl -pe 's/(.*)/\1 ./' > users
 postmap users
 
 # do aliases