After I went from analog cable TV reception to a shiny satellite dish on our roof I was facing new challenges. Like how the hell do I watch TV on my workstation now and how do I record programmes to DVD now? Luckily the watching part was a cakewalk thanks to kaffeine. The great KDE media player was surprisingly capable in helping me find my hundreds of (mostly useless) TV and radio channels pouring from the sky. And it has a timer function, a simple EPG (that really needs some love) and a recording feature for DVB-S transport streams. So much for that.
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After a decade of writing web applications with Perl CGIs I switched to Python as a programming language and found that writing CGIs became harder than expected. After some research it seemed that most web developers avoid CGIs and rather use MVC frameworks like Django, Turbogears or - my favorite - Pylons. Turns out they were right.
You tried to send an email from an IP address that is blacklisted. Our mail system makes use of blacklists to reduce the amount of spam that our users need to bear.
Thanks for your interest in my project. I have done a whole lot of programming in my life. But only some of them can be released as open source which have not been done for paying customers or employers. Feel free to browse through the...
Thanks for your tutorial. I've been doing a pile of postfix reading this week and just didn't know which way to go. Your tutorial was well written; had the appropriate amount of commentary; nicely marked up; and of course nicely configured.
Contributions from various emails I received from readers of the Postfix tutorials can be found on this page. Most are just put here to make them available as soon as I get them. I will happily include them in the next revision of the tutorial. Thanks to everybody who contributed their work.
Sometimes a network service is just not behaving the way it should. And the log files do not help you either. Then it is time to use the power of tcpdump and Wireshark to get a deeper look on what is actually happening on the wire.
If you have an X11 running on the host in question you may just start Wireshark and start recording the traffic. However often you need to record traffic that is running on a machine you can just login through SSH. Don't panic - you can still analyze the traffic.
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