Blacklist and Whitelist with Amavisd
Configure Blacklist and Whitelist with Amavisd in ZIMBRA instead of Postfix Blacklist/Whitelist. Configuration steps: 1. Edit /opt/zimbra/conf/amavis.conf.in and add the following…
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392 notes on Linux, tools and troubleshooting
How to block external email from domains or individual email
To configure ZIMBRA to reject external email addressed to users in the system, or blacklist email, follow these steps. 1. Configure smtpd_sender_restrictions as shown below.
How to change the recipient of the "daily report"
By default, ZIMBRA emails the system daily report to [email protected]. To send the daily report to a different email address, use the following procedure.
Configuring Whitelist/Blacklist on ZIMBRA 8.5/8.6
ZIMBRA 8.5 and later changed the configuration for blacklists and whitelists. To add whitelist/blacklist entries, follow these steps. Whitelist: create /opt/zimbra…
White list for ZIMBRA to bypass RBLs
If you use RBLs such as spamhaus.org on ZIMBRA to block spam, a customer's mail server may be blacklisted by the RBLs and unable to send to your system after being identified as potential spam.
Mail preview does not fill the screen in Zimbra Web Client 8.x and Google Chrome
A new Google Chrome version released on 2 September 2015 caused Zimbra Web Client 8.6, 8.5, and 8.0 to display the mail preview incorrectly, cutting it off instead of filling the screen.
How to fix "loopback devices is strongly discouraged for production use" on Docker
Docker 1.6+ on CentOS 7 or RHEL 7 may warn that loopback devices are strongly discouraged for production use when using devicemapper storage.
How to fix dead VLAN (4095) on neutron
If VMs cannot ping their gateway or router after creating a network and router in OpenStack, check the VLAN tags in Open vSwitch on the compute and network nodes.
How to fix cloud-config not work with error "Failed loading yaml blob"
If cloud-config on an AWS EC2 instance or OpenStack does not behave as configured, and the error log shows Failed at merging in cloud config part from ... as below…