==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 0.9.9
- Deployed with iRedMail Easy or the downloadable installer? downloadable
- Linux/BSD distribution name and version: Ubuntu 16.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? Yes
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

This was mailed to us from our root account... something wrong with the quarantine notify script again:

Traceback (most recent call last):
  File "/opt/www/iredadmin/tools/notify_quarantined_recipients.py", line 300, in <module>
    time_tuple = time.strptime(time_with_tz, '%Y-%m-%d %H:%M:%S')
  File "/usr/lib/python2.7/_strptime.py", line 478, in _strptime_time
    return _strptime(data_string, format)[0]
  File "/usr/lib/python2.7/_strptime.py", line 329, in _strptime
    found = format_regex.match(data_string)
TypeError: expected string or buffer