This post explains how to enable plain text authentication in Zimbra mail server, it also explains the necessary changes that needs to be made on the proxy service 1. Enable plain…
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01Nov, 2019
Zimbra: Configure Sender Address Verification
In Zimbra mail initially mail lands in the proxy SMTP port and then is sent to the actual SMTP server and only after that the recipient verification is triggered. Below…
10Oct, 2018
Enabling Brutforce Notifications on Zimbra Mail Server
Like any other mail server’s Zimbra too is prone to SMTP brutforce attacks. Hackers around the world try to login to the SMTP servers with the most commonly used email…
23Mar, 2018
Clear Exim Mail Queue
Spamming is one of the things we often face as administrators in the day to day work, if you are using Exim mail server, below commands will help you to…
30Apr, 2016
Installing Zimbra 8.6 on CentOS 7
1. Setup hostname 2. Add entry in hosts file 3. Install dependencies yum install nmap-ncat perl perl-core sysstat 4. Download Zimbra installation file for CentOS 7 wget https://files.zimbra.com/downloads/8.6.0_GA/zcs-8.6.0_GA_1153.RHEL7_64.20141215151110.tgz 5. Uncompress the file tar -xvf https://files.zimbra.com/downloads/8.6.0_GA/zcs-8.6.0_GA_1153.RHEL7_64.20141215151110.tgz 6. Enter the…
07Apr, 2016
Exim:Important Exim Mail Server commands
1. To check the number of emails present in the queue: exim -bpc 2. To check the emails present in the queue with the mail id and sender ID: exim -bp exim -bp |…
08Mar, 2016
Zimbra: Assign a dedicated Outgoing SMTP IP for a domain
Zimbra Outgoing SMTP IP per Domain 1. Add the following line in “/opt/zimbra/postfix/conf/main.cf” sender_dependent_default_transport_maps = regexp:/opt/zimbra/postfix/conf/sdd_transport_maps.regexp 2. Create the file “/opt/zimbra/postfix/conf/sdd_transport_maps.regexp” and add the domains as below /@example\.com$/ …
07Mar, 2016
BASH: Script to alert when Exim mail queue is HIGH
The following script sends an alert whenever the exim mail queue is greater than a certain threshold #!/bin/bash if [ `/usr/sbin/exim -bpc` -ge 300 ]; then mail -s “Alert: There are over 300…
01Mar, 2016
Script to Test Email Mail Delivery using SMTP Authentication
The below script may be useful to test the mail delivery using email authentication with and without SSL Note: The script uses pear Mail function, so make sure that PEAR Mail…
25Feb, 2016
Online System/Network Admin Tools
1. MXTOOLBOX: One of the most popular website to check MX Records, Blacklist Status, SPF, DKIM, DNS, OPEN Ports etc … website: http://www.mxtoolbox.com 2. WHATISMYDNS: Want to check the global propogation status of your…
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