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IT Notes and Recomendations

My personal recommendation for free anti Virus
https://tech.saqr.org/2019/09/best-free-antivirus-for-home-use.html

I needed a way to warn my users when they were using their zimbra webmail that email came from external domain and be aware of phishing attempts.  I was able to modify and existing zimlet to display a yellow banner.
https://tech.saqr.org/2020/01/with-phishing-attempts-that-consonantly.html

For users that are reading an email on their phone client they would not get the above warning banner.  I wanted to rewrite the subject with external.  We are using Sophos UTM 9 for our mail filtering gateways so I made the change on the Sophos UTM 9 exim to tag emails from outside our domain with [EXTERNAL]
https://tech.saqr.org/2020/01/for-incoming-email-not-from-our-domain.html

When users forward the external email outside the company I wanted to remove the [EXTERNAL] tag in the subject so I added an additional elif block to the system_filter on exim.
https://tech.saqr.org/2020/01/remove-external-from-subject-on-exim.html

Zimbra change domain ham.spam, virus-quarantine, and galsync account
https://tech.saqr.org/2020/01/zimbra-move-change-domain-ham-spam.html

Thanks
Sam Saqr

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