diff options
| -rwxr-xr-x | script/handle-mail-replies | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/script/handle-mail-replies b/script/handle-mail-replies new file mode 100755 index 000000000..5762ddd31 --- /dev/null +++ b/script/handle-mail-replies @@ -0,0 +1,68 @@ +#!/usr/bin/ruby + +# Handle email responses sent to us. +# +# This script is invoked as a pipe command, i.e. with the raw email message on stdin. +# - If a message is identified as a permanent bounce, the user is marked as having a +# bounced address, and will not be sent any more messages. +# - If a message is identified as an out-of-office autoreply, it is discarded. +# - Any other messages are forwarded to config.get("FORWARD_NONBOUNCE_RESPONSES_TO") + + +# We want to avoid loading rails unless we need it, so we start by just loading the +# config file ourselves. +$alaveteli_dir = File.join(File.dirname(__FILE__), '..') +$:.push(File.join($alaveteli_dir, "commonlib", "rblib")) +load "config.rb" +MySociety::Config.set_file(File.join($alaveteli_dir, 'config', 'general'), true) +MySociety::Config.load_default + +def main + load_rails + raw_message = $stdin.read + pfa = permanently_failed_address(raw_message) + if pfa.nil? + not_a_bounce(raw_message) + else + record_bounce(pfa, raw_message) + end +end + +def permanently_failed_address(raw_message) + message = TMail::Mail.parse(raw_message) + + if message.header_string("Return-Path") == "<>" + # Some sort of auto-response + + # Check for Exim’s X-Failed-Recipients header + failed_recipients = message.header_string("X-Failed-Recipients") + if !failed_recipients.nil? + # The X-Failed-Recipients header contains the email address that failed + # Check for the words "This is a permanent error." in the body, to indicate + # a permanent failure + if message.body =~ /This is a permanent error./ + return failed_recipients + end + end + return nil + end +end + +def not_a_bounce(raw_message) + forward_non_bounces_to = MySociety::Config.get("FORWARD_NONBOUNCE_RESPONSES_TO", "user-support@localhost") + IO.popen("/usr/sbin/sendmail -i #{forward_non_bounces_to}", "w") do |f| + f.write(raw_message); + f.close; + end +end + +def load_rails + require File.join($alaveteli_dir, 'config', 'boot') + require RAILS_ROOT + '/config/environment' +end + +def record_bounce(email_address, bounce_message) + User.record_bounce_for_email(email_address, bounce_message) +end + +main |