On each Zimbra deployment strategy, I’ve never activate Failed Login Lockout Policy as it tend to block legitimate user from being logged in due to brute force attack from others. The legitimate users often become a victim for spammer or robot attempt to login. I would also prefer Fail2ban to block login attempt from spammer…
On previous script, we can delete spam from queue by passing sender or recipient address on the script : [code lang=”bash”] pfdel email-spammer [/code] But what about situation where spammer filling up queue with random sender and recipient, and it tooks time to delete each message. Yes, we can use Postfix powerful binary, with postsuper…
I have a small script-got it from Internet-for Zimbra spam queue removal based on Postfix queue message removal. The script written on Perl language and become a mandatory script on each Zimbra server deployment, as a quick tools to remove spam message from queue caused by compromised account. As of Zimbra 8.7, there is a little…
As a powerful mail server, Zimbra has some system security features applied by default. We can also applying some additional security policy to increase mail server protection, such as applying PolicyD and Fail2Ban All the above security rule may be sufficient, but there are some additional security tips should be considered, especially in the case…
As a powerful mail server, Zimbra has some system security features applied by default. We can also applying some additional security policy to increase mail server protection, such as applying PolicyD and Fail2Ban All the above security rule may be sufficient, but there are some additional security tips should be considered, especially in the case…
From PolicyD website : Policyd v2 (codenamed “cluebringer”) is a multi-platform policy server for popular MTAs. This policy daemon is designed mostly for large scale mail hosting environments. The main goal is to implement as many spam combating and email compliance features as possible while at the same time maintaining the portability, stability and performance…