--- a/docs/neomuttrc.head
+++ b/docs/neomuttrc.head.new
@@ -48,6 +48,9 @@ bind browser y exit
 # be undone with unmime_lookup.
 mime_lookup application/octet-stream

+# System-wide CA file managed by the ca-certificates package
+set ssl_ca_certificates_file="/etc/ssl/certs/ca-certificates.crt"
+
 ##
 ## *** DEFAULT SETTINGS FOR THE ATTACHMENTS PATCH ***
 ##