Zimbra Anti-Spam Best Practices in 2021

Do you use Zimbra? Zimbra Collaboration, formerly known as the Zimbra Collaboration Suite (ZCS) before 2019, is an open-source collaborative software suite that includes an email server and a web client.

L. Mark Stone from Zimbra partner Mission Critical Email has put together an overview of his recommended best practices for how Zimbra admins can best prevent inbound spam and phishing emails. Even if you don't use Zimbra, it's great to hear his experiences -- you'll see he uses and recommends three commercial (i.e. paid) blockinf list providers: Invaluement, URIBL and Spamhaus.

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