![]() If the number of queries exceeds the limit, the requesting IP address is blocked. Various DNS blacklist operators have defined query limits that restrict requests from a single IP address. The fact that spamassassin does not use any/only some DNS blacklists can be recognized, for example, by the fact that the test URIBL_BLOCKED is listed in the mail header X-Spam-Status. ![]() Sign up for our newsletter and like our social media pages for quick updates.Problem: spamassassin does not seem to use DNS blacklists and therefore has a poor detection rate This marks the end of our article on Configure whitelist and blacklist Zimbra Amavis Spam filtering. The zimbraMtaMyNetworks configuration is then included in Amavis in which causes those IPs to be white-listed. $ zmprov ms `zmhostname` zimbraMtaMyNetworks '127.0.0.0/8 10.0.0.0/8 192.168.3.0/22'Ī point to note is that zmconfigd will automatically restart the MTA processes after this change is made. To update a list of trusted MTA networks, use the commands: $ sudo su - zimbra $ zmprov gs `zmhostname` zimbraMtaMyNetworks Only then should Amavis bypass SpamAssassin for all messages originating internal trusted networks.Ĭheck the setting for the current list of trusted networks $ sudo su - zimbra When it has been enabled, restart the following services related to Amavis. $ zmprov mcf zimbraAmavisOriginatingBypassSA TRUE First, you need to enable bypass feature which is disabled by default. Whitelist certain IP ranges on Zimbra AmavisĪssuming you trust a network e.g an internal network and would like to bypass checks for these networks, you can configure this on Amavis. You can now retry sending email from a blocked domain/address or whitelisted ones and see if the email is delivered. sudo su - zimbra -c "zmamavisdctl restart" Read_hash(%blacklist_sender, '/opt/zimbra/conf/blacklist') Īfter saving the changes, restart the amavis service. read_hash(%whitelist_sender, '/opt/zimbra/conf/whitelist') Now you need to modify your /opt/zimbra/conf/ configuration file have checks on the two files we just added above. $ sudo touch /opt/zimbra/conf/Īll whitelists will be in the file /opt/zimbra/conf/whitelist, the blacklisted will be in the file /opt/zimbra/conf/blacklist. Whitelist | Blacklist a domain or email address on Zimbra AmavisĬreate two files that will store the domains and email addresses you wish to whitelist or blacklist. By default, all sender addresses will be triggered. Sender address triggers FILTER smtp-amavis::10026: This means an email will be filtered through amavis. NOQUEUE: Postfix hasn’t assigned a queue-id to this message as of yet. There are mainly two types of messages logged by Amavis, namely: The vice versa is also true, where you need to blacklist a domain or IP address you know is associated with spammers. ![]() At some point, you may encounter false negatives, mostly common with encrypted and executable files, and would like to whitelist the trusted domain, email address or network. Zimbra uses Amavis to scan incoming and outgoing emails for viruses, and gives postfix reply whether the email should be delivered or dropped depending on the results of the scan. ![]() Best with Postfix, fine with dual-sendmail setup and Exim v4, works with sendmail/milter, or with any MTA as an SMTP relay. It talks to MTA via (E)SMTP or LMTP, or by using helper programs. It is written in Perl for maintainability, without paying a significant price for speed. ![]() What is Amavis?įrom Amavis’s site – Amavis is a high-performance interface between mailer (MTA) and content checkers: virus scanners, and/or SpamAssassin. Both for domains, email addresses, and IP networks/addresses. On this guide, I’ll show you how to Configure whitelist and blacklist Zimbra Amavis Spam filtering. If you’re on this page it means you’ve experienced noqueue messages on Zimbra Amavis for some emails. ![]()
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