diff --git a/pica-mail-mta/Dockerfile b/pica-mail-mta/Dockerfile
index 188ef73d165564b59bc81422e8f7890f7544d308..1cf4335f97228fd75c669c9b5c14000897dfa695 100644
--- a/pica-mail-mta/Dockerfile
+++ b/pica-mail-mta/Dockerfile
@@ -47,6 +47,7 @@ ENV LMTP_PORT 24
 ENV SMTPD_CLIENT_RESTRICTIONS reject_rbl_client sbl.spamhaus.org, reject_rbl_client dnsbl.sorbs.net
 
 COPY saslauthd-postfix /etc/default/
+COPY ldap-virtual-mailbox-maps /etc/postfix/ldap-virtual-mailbox-maps
 COPY entrypoint.sh /
 
 ENTRYPOINT ["/entrypoint.sh"]