diff --git a/etc-relay/postfix/main.cf b/etc-relay/postfix/main.cf
index 76a74ed..ff058ea 100644
--- a/etc-relay/postfix/main.cf
+++ b/etc-relay/postfix/main.cf
@@ -33,8 +33,8 @@ default_transport = smtp:
 
 # SMPTD (inbound) TLS parameters
 smtpd_tls_CApath = /etc/ssl/certs
-smtpd_tls_CAfile = /etc/ssl/certs/kopano-ca.crt
-smtpd_tls_key_file=/etc/ssl/private/pf-relay.key
+smtpd_tls_CAfile = /usr/local/share/ca-certificates/kopano-ca.crt
+smtpd_tls_key_file=/etc/ssl/private/relay.key
 smtpd_tls_cert_file=/etc/ssl/relay-full-chain.pem
 smtpd_tls_security_level=may
 smtpd_tls_loglevel = 1
@@ -47,7 +47,7 @@ smtpd_relay_restrictions = permit_mynetworks reject_unauth_destination
 
 # SMTP (outbound)
 smtp_tls_CApath=/etc/ssl/certs
-smtp_tls_key_file=/etc/ssl/private/pf-relay.key
+smtp_tls_key_file=/etc/ssl/private/relay.key
 smtp_tls_cert_file=/etc/ssl/relay-full-chain.pem
 smtp_tls_security_level=may
 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
diff --git a/etc-zntrl/postfix/main.cf b/etc-zntrl/postfix/main.cf
index 6e573bb..ab53dc0 100644
--- a/etc-zntrl/postfix/main.cf
+++ b/etc-zntrl/postfix/main.cf
@@ -35,19 +35,20 @@ virtual_transport = lmtp:dagent:2003
 default_transport = smtp:[relay.zntrl.de]:465
 
 # SMTPD (inbound) TLS parameters
-smtpd_tls_key_file = /etc/postfix/ssl/private/nuc0.lan.key
-smtpd_tls_cert_file = /etc/postfix/ssl/nuc0-full-chain.pem
 smtpd_tls_CApath = /etc/ssl/certs
-smtpd_tls_CAfile = /etc/postfix/ssl/certs/balusign-signing-ca.pem
-smtpd_tls_security_level=may
+smtpd_tls_CAfile = /usr/local/share/ca-certificates/kopano-ca.crt
+smtpd_tls_key_file = /etc/ssl/private/zntrl.key
+smtpd_tls_cert_file = /etc/ssl/zntrl.crt
+smtpd_tls_security_level = may
 smtpd_tls_loglevel = 1
 
 smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
 
 # SMTP (outbound)
-smtp_tls_key_file = /etc/postfix/ssl/private/nuc0.lan.key
-smtp_tls_cert_file = /etc/postfix/ssl/nuc0-full-chain.pem
 smtp_tls_CApath=/etc/ssl/certs
+smtd_tls_CAfile = /usr/local/share/ca-certificates/kopano-ca.crt
+smtd_tls_key_file = /etc/ssl/private/zntrl.key
+smtd_tls_cert_file = /etc/ssl/zntrl.crt
 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
 smtp_tls_wrappermode = yes
 smtp_tls_security_level = encrypt
diff --git a/etc-zntrl/postfix/relay_clientcerts b/etc-zntrl/postfix/relay_clientcerts
index 192f3b1..2bfbc90 100644
--- a/etc-zntrl/postfix/relay_clientcerts
+++ b/etc-zntrl/postfix/relay_clientcerts
@@ -1,2 +1,3 @@
-57:6c:b5:f6:49:0e:9d:62:cc:c5:63:80:e5:64:58:ed relay.de
-d4:16:18:1e:21:37:45:fa:a9:ad:d7:7f:0c:37:8f:7c zntrl.de
+59:60:7e:df:d6:b9:96:2a:38:b3:71:a2:7b:5d:bc:44 relay
+14:38:ee:53:a2:9f:7d:3a:75:f3:e7:11:99:dd:85:5d zntrl
+3b:ad:6d:65:38:a9:0a:63:89:41:3a:95:96:e0:e6:65 baloghs
diff --git a/etc-zntrl/postfix/virtual.db b/etc-zntrl/postfix/virtual.db
new file mode 100644
index 0000000..b82c97a
Binary files /dev/null and b/etc-zntrl/postfix/virtual.db differ
diff --git a/etc-zntrl/postfix/vmailbox.db b/etc-zntrl/postfix/vmailbox.db
new file mode 100644
index 0000000..c103053
Binary files /dev/null and b/etc-zntrl/postfix/vmailbox.db differ
diff --git a/postfix/Dockerfile b/postfix/Dockerfile
index 2c606f0..72d1856 100644
--- a/postfix/Dockerfile
+++ b/postfix/Dockerfile
@@ -10,6 +10,7 @@ apt-get autoclean
 rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* ~/.cache ~/.npm
 EOF
 COPY etc/postfix/ /etc/postfix/
+COPY etc/ssl/ /etc/ssl/
 COPY --chmod=0775 entrypoint.sh /entrypoint.sh
 EXPOSE 25
 VOLUME /var/spool/postfix
diff --git a/postfix/entrypoint.sh b/postfix/entrypoint.sh
index 5df19be..1f8b328 100644
--- a/postfix/entrypoint.sh
+++ b/postfix/entrypoint.sh
@@ -1,7 +1,12 @@
 #!/usr/bin/env sh
 set -e
+# https://github.com/moby/moby/issues/31243
+chmod o+w /dev/stdout
 # https://serverfault.com/questions/1003885/postfix-in-docker-host-or-domain-name-not-found-dns-and-docker
 cp /etc/resolv.conf /var/spool/postfix/etc/resolv.conf
 postmap /etc/postfix/virtual
 postmap /etc/postfix/vmailbox
+postmap /etc/postfix/relay_clientcerts
+cp -r /etc/ssl/usr-local-share-ca-certificates/* /usr/local/share/ca-certificates/
+update-ca-certificates
 exec "$@"
diff --git a/postfix/etc/postfix/main.cf b/postfix/etc/postfix/main.cf
index 6e573bb..7a181b7 100644
--- a/postfix/etc/postfix/main.cf
+++ b/postfix/etc/postfix/main.cf
@@ -35,19 +35,19 @@ virtual_transport = lmtp:dagent:2003
 default_transport = smtp:[relay.zntrl.de]:465
 
 # SMTPD (inbound) TLS parameters
-smtpd_tls_key_file = /etc/postfix/ssl/private/nuc0.lan.key
-smtpd_tls_cert_file = /etc/postfix/ssl/nuc0-full-chain.pem
 smtpd_tls_CApath = /etc/ssl/certs
-smtpd_tls_CAfile = /etc/postfix/ssl/certs/balusign-signing-ca.pem
+smtpd_tls_CAfile = /usr/local/share/ca-certificates/kopano-ca.crt
+smtpd_tls_key_file=/etc/ssl/private/zntrl.key
+smtpd_tls_cert_file=/etc/ssl/zntrl.crt
 smtpd_tls_security_level=may
 smtpd_tls_loglevel = 1
 
 smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
 
 # SMTP (outbound)
-smtp_tls_key_file = /etc/postfix/ssl/private/nuc0.lan.key
-smtp_tls_cert_file = /etc/postfix/ssl/nuc0-full-chain.pem
 smtp_tls_CApath=/etc/ssl/certs
+smtd_tls_key_file=/etc/ssl/private/zntrl.key
+smtd_tls_cert_file=/etc/ssl/zntrl.crt
 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
 smtp_tls_wrappermode = yes
 smtp_tls_security_level = encrypt
diff --git a/postfix/etc/postfix/ssl/certs/balusign-signing-ca.pem b/postfix/etc/postfix/ssl/certs/balusign-signing-ca.pem
deleted file mode 100644
index 10c08d7..0000000
--- a/postfix/etc/postfix/ssl/certs/balusign-signing-ca.pem
+++ /dev/null
@@ -1,106 +0,0 @@
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
diff --git a/postfix/etc/postfix/ssl/nuc0-full-chain.pem b/postfix/etc/postfix/ssl/nuc0-full-chain.pem
deleted file mode 100644
index ea3b47a..0000000
--- a/postfix/etc/postfix/ssl/nuc0-full-chain.pem
+++ /dev/null
@@ -1,148 +0,0 @@
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
diff --git a/postfix/etc/postfix/ssl/private/nuc0.lan.key b/postfix/etc/postfix/ssl/private/nuc0.lan.key
deleted file mode 100644
index f64176b..0000000
--- a/postfix/etc/postfix/ssl/private/nuc0.lan.key
+++ /dev/null
@@ -1,40 +0,0 @@
------BEGIN PRIVATE KEY-----
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-GAo61UauOk2kSB6B9crXzYo=
------END PRIVATE KEY-----
\ No newline at end of file
diff --git a/postfix/etc/postfix/virtual.db b/postfix/etc/postfix/virtual.db
new file mode 100644
index 0000000..b82c97a
Binary files /dev/null and b/postfix/etc/postfix/virtual.db differ
diff --git a/postfix/etc/postfix/vmailbox.db b/postfix/etc/postfix/vmailbox.db
new file mode 100644
index 0000000..c103053
Binary files /dev/null and b/postfix/etc/postfix/vmailbox.db differ
diff --git a/postfix/etc/ssl/private/zntrl.key b/postfix/etc/ssl/private/zntrl.key
new file mode 100644
index 0000000..e4fd4a3
--- /dev/null
+++ b/postfix/etc/ssl/private/zntrl.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvwIBADANBgkqhkiG9w0BAQEFAASCBKkwggSlAgEAAoIBAQCsW2Y5dguEpUKq
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+/3Hx0yfA8f+7za/1VkFq+hfrow==
+-----END PRIVATE KEY-----
diff --git a/postfix/etc/ssl/usr-local-share-ca-certificates/kopano-ca.crt b/postfix/etc/ssl/usr-local-share-ca-certificates/kopano-ca.crt
new file mode 100644
index 0000000..d7954ce
--- /dev/null
+++ b/postfix/etc/ssl/usr-local-share-ca-certificates/kopano-ca.crt
@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----
+MIID8zCCAtugAwIBAgIBATANBgkqhkiG9w0BAQsFADCBiDESMBAGCgmSJomT8ixk
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+JzT+f0FFqg==
+-----END CERTIFICATE-----
diff --git a/postfix/etc/ssl/zntrl-full-chain.pem b/postfix/etc/ssl/zntrl-full-chain.pem
new file mode 100644
index 0000000..60c035d
--- /dev/null
+++ b/postfix/etc/ssl/zntrl-full-chain.pem
@@ -0,0 +1,48 @@
+-----BEGIN CERTIFICATE-----
+MIID8zCCAtugAwIBAgIBATANBgkqhkiG9w0BAQsFADCBiDESMBAGCgmSJomT8ixk
+ARkWAmRlMRMwEQYKCZImiZPyLGQBGRYDZHRzMSAwHgYDVQQKDBdEaWdpdGFsIFRy
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+JzT+f0FFqg==
+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+vnW52LhdAuRW81AaU/Z2hdCZz0WenQO+dH1GaR/fMcSYlfWbk6uR
+-----END CERTIFICATE-----
diff --git a/postfix/etc/ssl/zntrl.crt b/postfix/etc/ssl/zntrl.crt
new file mode 100644
index 0000000..182fbe6
--- /dev/null
+++ b/postfix/etc/ssl/zntrl.crt
@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----
+MIIEEzCCAvugAwIBAgIBCTANBgkqhkiG9w0BAQsFADCBiDESMBAGCgmSJomT8ixk
+ARkWAmRlMRMwEQYKCZImiZPyLGQBGRYDZHRzMSAwHgYDVQQKDBdEaWdpdGFsIFRy
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+vnW52LhdAuRW81AaU/Z2hdCZz0WenQO+dH1GaR/fMcSYlfWbk6uR
+-----END CERTIFICATE-----
diff --git a/postfix/scratchpad.sh b/postfix/scratchpad.sh
index 7150e81..91c2e4c 100644
--- a/postfix/scratchpad.sh
+++ b/postfix/scratchpad.sh
@@ -1,7 +1,11 @@
 #!/usr/bin/bash
 # export DOCKER_BUILDKIT=1
 # docker run -d --name apache -p80:80 -v/root/kopano/dist:/var/www httpd
-docker build -t postfix .
+rm -rf etc
+mkdir etc
+cp -r ~/kopano-docker/etc-zntrl/postfix etc
+cp -r ~/kopano-docker/etc-zntrl/ssl etc
+docker build -t baloan/postfix .
 docker run -d --name postfix -v/root/kopano/postfix/etc/postfix:/etc/postfix -p8025:25 postfix 
 docker logs -f postfix
 docker exec -it postfix sh
diff --git a/spampd/entrypoint.sh b/spampd/entrypoint.sh
index bdd437e..877b4b7 100644
--- a/spampd/entrypoint.sh
+++ b/spampd/entrypoint.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env sh
 set -e
+# https://github.com/moby/moby/issues/31243
+chmod o+w /dev/stdout
 /usr/sbin/rsyslogd
-su spamd -c "sa-update --gpghomedir /var/lib/spamassassin/sa-update-keys"
+# su spamd -c "sa-update --gpghomedir /var/lib/spamassassin/sa-update-keys"
 exec "$@"
diff --git a/spampd/scratchpad.sh b/spampd/scratchpad.sh
index 91451e1..783cd40 100644
--- a/spampd/scratchpad.sh
+++ b/spampd/scratchpad.sh
@@ -4,6 +4,7 @@
 docker rm spampd
 docker build -t spampd .
 docker run -it --rm --name spampd spampd
+docker run --rm --name spampd spampd
 docker logs -f spampd
 docker exec -it spampd sh
 
diff --git a/ssl/create-postfix-certs b/ssl/create-postfix-certs
index 3b32847..4d4951f 100644
--- a/ssl/create-postfix-certs
+++ b/ssl/create-postfix-certs
@@ -7,7 +7,8 @@ pushd certs
 # https://www.postfix.org/postconf.5.html#relay_clientcerts
 openssl x509 -in $CN.crt -noout -pubkey | openssl pkey -pubin -outform DER | openssl dgst -md5 -c | ( read D FP; echo $FP $CN ) >>relay_clientcerts
 cp $CN.key ~/kopano-docker/etc-$CN/ssl/private
+cat $CN.key $CN.crt kopano-ca.crt >~/kopano-docker/etc-$CN/ssl/private/$CN-key-certs.pem
 # https://ubuntu.com/server/docs/security-trust-store
 cp kopano-ca.crt ~/kopano-docker/etc-$CN/ssl/usr-local-share-ca-certificates
-cat kopano-ca.crt $CN.crt >~/kopano-docker/etc-$CN/ssl/$CN-full-chain.pem
+cat kopano-ca.crt $CN.crt >~/kopano-docker/etc-$CN/ssl/$CN-cert-chain.pem
 popd