Centos 8 Install
https://computingforgeeks.com/install-zimbra-mail-server-on-centos-rhel/
ssl var burada
https://www.scaleway.com/en/docs/how-to-install-zimbra-on-ubuntu-xenial/
Sunucu Performans artırma
http://blog.jeshurun.ca/technology/zimbra-8-7-low-memory-ram-performance-tuning
Mail gitmeme Problemi
http://shahzadlinux.blogspot.com/2016/03/how-to-configure-outgoing-smtp.html
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Zimbra Mail Server 8.8.15 Setup Dkim Sfp and Dmrac record #zimbra
https://www.youtube.com/watch?v=fJP8OhGLDvI&ab_channel=HBTutorial
Dmarc Detaylı anlatım
Kurulumlar
https://blog.zimbra.com/2015/04/email-protection-best-practices-spf-dkim-dmarc/
Kara liste kontrol
https://mxtoolbox.com/blacklists.aspx
DKIM ayarını 1024 yapma
https://nutss.wordpress.com/2017/05/06/zimbra-8-7-add-dkim-1024-bit/