commit b78bc3ff922ea53d972f994e670dd3c39f97e5d0 Author: Cecylia Bocovich cohosh@torproject.org Date: Fri May 22 16:36:36 2020 -0400

Ignore emails from Mail Delivery System

This ignores emails with the username "MAILER-DAEMON", a common email for mail delivery systems. The goal of this is to avoid getting into a loop with mail delivery system autoresponders after a bounced email. --- gettor/parse/email.py | 8 +++++++- tests/test_email_service.py | 7 +++++++ 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/gettor/parse/email.py b/gettor/parse/email.py index 5a3e45e..d37614d 100644 --- a/gettor/parse/email.py +++ b/gettor/parse/email.py @@ -84,6 +84,11 @@ class EmailParser(object): "Email address normalized and validated.", system="email parser" ) + + # Add a check for auto-generated mail-daemon emails + if "mailer-daemon@" in norm_addr.lower(): + raise AddressError("Received mail from Mail Delivery System {}" + .format(msg['From'])) return True

else: @@ -206,7 +211,8 @@ class EmailParser(object): try: self.validate(norm_addr, msg) except AddressError as e: - log.message("Address error: {}".format(e.args)) + log.msg("Address error: {}".format(e.args)) + return {}

hid = hashlib.sha256(norm_addr.encode('utf-8')) log.msg( diff --git a/tests/test_email_service.py b/tests/test_email_service.py index 3803e79..a41669f 100644 --- a/tests/test_email_service.py +++ b/tests/test_email_service.py @@ -289,6 +289,13 @@ class EmailServiceTests(unittest.TestCase): ">\n") self.assertEqual(request["command"], "help")

+ def test_bounce(self): + ep = conftests.EmailParser(self.settings, "gettor@torproject.org") + request = ep.parse("From: MAILER-DAEMON@mx1.riseup.net\n" + "Subject: Undelivered Mail Returned to Sender\r\n" + "To: gettor@torproject.org\n osx en\n") + + self.assertEqual(request, {})

if __name__ == "__main__": unittest.main()