---
layout: wiki
title: EmailApplicationServerInJail
updated: 2020-10-12 19:16
author: rick
default: false
---

## Links Used

- <http://www.cyrusimap.org/docs/cyrus-sasl/2.1.23/components.php>
- <http://www.howtoforge.com/virtual_postfix_mysql_quota_courier_p2>
- <http://www.freebsddiary.org/samba-pam.php>
- <http://www.freebsd.org/doc/en/articles/pam/index.html>
- <http://www.sendmail.org/~ca/email/cyrus2/sysadmin.html>
- <http://www.postfix.org/SASL_README.html#server_sasl>
- <http://enc.com.au/2005/03/postfixmysql/>
- <http://tldp.org/HOWTO/Cyrus-IMAP-7.html>
- <http://www.gsp.com/cgi-bin/man.cgi?section=8>&topic=saslpasswd2
- <http://olivier.sessink.nl/jailkit/howtos_debug_jails.html>
- <http://asyd.net/docs/cyrus-options.html>
- <http://bobpeers.com/technical/telnet_imap>
- <http://email.uoa.gr/projects/cyrus/autocreate/README.autocreate-cyrus-2.3>
- <http://delouw.ch/linux/Postfix-Cyrus-Web-cyradm-HOWTO/html/cyrus-config.html>
- <http://www.sendmail.org/~ca/email/cyrus2/components.html>
- <http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html>
- <http://comments.gmane.org/gmane.comp.security.cyrus.sasl/2532>
- <http://www.jeff-barr.com/?p=112>
- <http://asyd.net/docs/cyrus-options.html>
- <http://southbrain.com/south/2008/08/cmusaslsecretcrammd5-cmusaslse.html>

## Mailman

To avoid backscatter on mailman instances use the following parameters

```
subscribe_policy = 2
respond_to_post_requests = 0
reject_these_nonmember = []
generic_nonmember_action = 3
forward_auto_discards = 1
```

Also make sure the owner addresses have trust rules for mail coming from mail-man, since all (bounce) spam gets forwarded to the address. If you for example use a free account at BigCorp, you end up getting your mailman instance blacklisted in RBL rules due to backscatter SPAM and 'spammy' forwards.