Upgrade iRedMail from 0.9.1 to 0.9.2

ChangeLog

• 2015-05-16: [OPTIONAL][All backends] Update one Fail2ban filter regular expressio to help catch DoS attacks to SMTP service

General (All backends should apply these steps)

[OPTIONAL] Update one Fail2ban filter regular expressio to help catch DoS attacks to SMTP service

1. Open file /etc/fail2ban/filters.d/postfix.iredmail.conf or /usr/local/etc/fail2ban/filters.d/postfix.iredmail.conf (on FreeBSD), find below line under [Definition] section:

            lost connection after AUTH from (.*)\[<HOST>\]

Update above line to below one:

            lost connection after (AUTH|UNKNOWN|EHLO) from (.*)\[<HOST>\]

Restarting Fail2ban service is required.

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