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Home Archives for DNS checks
Fixing DNS: why you need a Trusted Recursive Resolver and DNS over HTTPS

Cloud Insidr 2018-06-06 Leave a Comment

Fixing DNS: why you need a Trusted Recursive Resolver and DNS over HTTPS

The DNS system is broken. The sorry state of DNS security exposes your server and your end users to a variety of risks. Some of those risks are preventable.

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Filed Under: cybersecurity and cyber warfare, DNS, encryption Tagged With: DNS, DNS checks, DNS over HTTPS, encryption

Anti-Spam Defense: Using Postfix With smtpd Access Restrictions

Cloud Insidr 2015-11-15 Leave a Comment

Anti-Spam Defense: Using Postfix With smtpd Access Restrictions

Fighting spam, aren’t we all… To stem the tide of unwanted junk mail look no further than the built-in access restrictions in Postfix.

[Read more…]

Filed Under: administration and orchestration, cloud, edge and everything in between, mail servers Tagged With: DNS checks, HELO, logs, mail, postfix, postmap, RBL, RHSBL, smtpd, spam, Spamhaus

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