A faster way to delete files

If you are struggling with millions of SPAM messages like me, you should rather use “find” instead of “rm” while deleting files in a folder. This method is tested to be faster than rm -rf: switch to the folder containing files, in my case: cd /var/spool/exim/ ans start deleting files by typing: find . -maxdepth […]

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Delete Mail From Queue in Exim

Deleting email from the exim queue is unfortunately not that simple. If you have a massive spammer in your system, you can clear the email originating from them with the command below. exim -bpru | tr ‘\n’ + | sed -e “s/++/=/g” | tr -d + | tr = ‘\n’ | grep “spammer@email.com” | awk […]

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Directadmin : Problem Receiving Emails – The “Unknown User” Issue

If you get a 550 error as a reply when you email a user with directadmin, saying Remote host said: 550 “Unknown User” or The error that the other server returned was: 550 550 “Unknown User” (state 13). or something equivalent, then the problem might be your virtual domainowner settings. This happens with exim especially […]

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Detecting Possible Mail Forgers in EXIM

The other day we were working on a mail server of a customer’s that spammed insanely. Since the mail transfer agent it uses is exim, it’s necessary to check the mainlog files. Whilst doing that, we realized the server was getting a lot of incoming mails as forgery. So, it is possible to get the […]

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