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Home Archives for cloud, edge and everything in between administration and orchestration mail servers

Some things never change. Love it or hate it, but everyone still needs email.

Clicking Clean Virginia: dirty energy powering the Data Center Alley

Cloud Insidr 2019-04-14 Leave a Comment

Clicking Clean Virginia: dirty energy powering the Data Center Alley

The digital transformation is driving a relentless growth of the data center industry. The main limiting factor is the availability of affordable power. Data center operators want cheap electricity. Their other stock holders want it green.

[Read more…]

Filed Under: cloud, edge and everything in between, databases, industry analysis, mail servers, networking, web servers in the cloud

How to set up DMARC

Cloud Insidr 2018-12-17 Leave a Comment

How to set up DMARC

The relentless onslaught of spam continues to drive mail administrators up the proverbial wall. DMARC, the unofficial successor to SPF (Sender Policy Framework), holds the promise of more email legitimacy, but can it deliver? Here is how you can put DMARC to the test.

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Filed Under: DNS, mail servers Tagged With: DMARC, DNS, email, SPF

How to migrate a mail server from one machine to another

Cloud Insidr 2018-09-12 Leave a Comment

How to migrate a mail server from one machine to another

There are two basic ways to migrate a mail server from one machine to another: with and without service downtime.

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Filed Under: mail servers Tagged With: email, mail

How to set up a mail server on AWS EC2 using open source software

Cloud Insidr 2017-08-23 3 Comments

How to set up a mail server on AWS EC2 using open source software

When running your own mail server you have complete control over its performance and reliability. Here is how to get started with an open-source mail server on AWS EC2.

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Filed Under: administration and orchestration, mail servers Tagged With: DNS, Dovecot, MTA, postfix, Route 53

How to verify the remaining validity of your letsencrypt certificates

Cloud Insidr 2017-04-30 Leave a Comment

How to verify the remaining validity of your letsencrypt certificates

In order to figure out how many days your letsencrypt certificates have left, you could check an online services such as:

https://www.ssllabs.com/ssltest/index.html

However, that won’t work for a mail server that’s not also running a web server using the same certificate.

In this case, your best bet is to check the certificate file directly using the openssl command as follows:

openssl x509 -noout -dates -in /etc/letsencrypt/live/smtp.yourmailserverdomainname.com/cert.pem

Filed Under: administration and orchestration, cloud, edge and everything in between, cybersecurity and cyber warfare, encryption, Linux, mail servers Tagged With: letsencrypt, OpenSSL

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