I have a dynamic IP from my internet service provider and sometimes it takes longer to SSH to my server as it needs to resolve the address. On static IP, I can put the address into public DNS server to […]
Sometimes we have a bunch of over quota message filling up Zimbra queue, with detail as below : 197CF170F9 59761 Wed Oct 24 09:49:48 email-palsu@vivianchow.id (host alt1.gmail-smtp-in.l.google.com[74.125.195.27] said: 452-4.2.2 The email account that you tried to reach is over quota. […]
I have some Amazon Lightsail Instance, a group of small server used as a load balancer for our SMTP cluster. Amazon Lightsail in short equivalent with DigitalOcean Droplet or Linode Node or a let say it is a simple set of […]
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 […]
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 […]