Don’t log recipients when sending mail

Since production applications typically run with log level info and
email adresses should be considered as sensitive data we want to prevent 
them from ending up in the logs. In development mode (with log level
debug) they are still logged as part of the Mail::Message object.

1 files changed, 2 insertions, 3 deletions

diff --git a/actionmailer/lib/action_mailer/log_subscriber.rb b/actionmailer/lib/action_mailer/log_subscriber.rb
index 25c99342c2..26910f20f0 100644
--- a/actionmailer/lib/action_mailer/log_subscriber.rb
+++ b/actionmailer/lib/action_mailer/log_subscriber.rb
@@ -10,11 +10,10 @@ module ActionMailer
     def deliver(event)
       info do
         perform_deliveries = event.payload[:perform_deliveries]
-        recipients = Array(event.payload[:to]).join(", ")
         if perform_deliveries
-          "Sent mail to #{recipients} (#{event.duration.round(1)}ms)"
+          "Delivered mail #{event.payload[:message_id]} (#{event.duration.round(1)}ms)"
         else
-          "Skipped sending mail to #{recipients} as `perform_deliveries` is false"
+          "Skipped delivery of mail #{event.payload[:message_id]} as `perform_deliveries` is false"
         end
       end