Linux Entropy – Usefull For Your Mail Server

List available entropy If you are not sure, whether you need haveged, run: # cat /proc/sys/kernel/random/entropy_avail This command shows you how much entropy your server has collected. If it is rather low (<1000), you should probably install haveged Resources: https://wiki.archlinux.org/index.php/Haveged https://www.digitalocean.com/community/tutorials/how-to-setup-additional-entropy-for-cloud-servers-using-haveged  

SOLVED: Yahoo temporarily deferred due to user complaints

Did you get this error message from Yahoo, when trying to send emails? Messages from *.*.*.*┬átemporarily deferred due to user complaints – 4.16.56.1; see https://help.yahoo.com/kb/postmaster/SLN3326.html (in reply to MAIL FROM command)) Well, I’ve got it too. After I searched the Internet, I’ve found this solution: How to remove Yahoo “temporarily deferred due to user complaints” … Read more