service/email.md

@@ -216,6 +216,7 @@ following commands:
     postconf -e smtp_sasl_security_options=
     postconf -e relayhost=submission.torproject.org:submission
     postconf -e smtp_tls_security_level=secure
+    postconf -e smtp_tls_CAfile=/etc/ssl/certs/ca-certificates.crt
     postfix reload
 
 The `/etc/postfix/sasl/passwd` file holds `hostname user:pass`