Redact email addr from error msgs

Addresses issue #34058 to scrub logs of personal info.

gettor/services/email/sendmail.py

@@ -235,7 +235,11 @@ class Sendmail(object):
                 yield self.conn.remove_request(
                     id=id, service="email", date=date
                 )
-            log.error("Error sending email: {}.".format(e))
+            log.error(
+                strings.redact_emails("Error sending email:{}.".format(e))
+                )
 
         except Exception as e:
-            log.error("Error sending email: {}.".format(e))
+            log.error(
+                strings.redact_emails("Error sending email:{}.".format(e))
+                )

gettor/utils/strings.py

@@ -13,6 +13,7 @@ the Tor Browser.
 import json
 import os
 import inspect
+import re
 
 strings = {}
 translations = {}
@@ -115,6 +116,10 @@ def load_strings(current_locale):
         strings[s] = translations[current_locale][s]
 
 
+def redact_emails(text):
+    redacted_text = re.sub(r'[\w\.+-]+@[\w\.+-]+', '[REDACTED_EMAIL]', text)
+    return redacted_text
+
 
 def translated(k):
     """