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Posts
Postfix Antispam
Root to bind ports under 1024?
A better round-robin DNS server
HOWTO: Linux and iSCSI
Gaming in the cloud
Enjoyable development
Offsite backup with iSCSI
Missing the point of SPF
Email blacklists
When things go wrong on Linux
jconsole remote connections
PFS in Firefox
Cookies
rm strcpy
Stream your CD collection to work
On-demand streaming audio server
Jesus saves, but Buddha makes incremental backups
Aaargh - more J2ME stupidity
Playing with software defined networking
Let a friend use your IP address to get access to a machine that you can access, but he can't
How to run two instances of Tomcat on your machine
Erlang
Apache vs nginx?
Running out of IPv4 address space?
How to update your Nokia N80 to the N80 Internet Edition firmware
Acer TravelMate 5720 4GB running Linux
IPv6
Peer's certificate has an invalid signature. (solved)
systemd
Reverse firewall
Linux driver support
Comments
Of course, there'll always be some mail servers that don't follow the RFCs properly. Checking the logs, I noticed the following: Sep 26 03:11:47 hosting postfix/smtpd[19263]: connect from mail7.exchange.microsoft.com[131.107.1.27] Sep 26 03:11:49 hosting postfix/smtpd[19263]: NOQUEUE: reject: RCPT from mail7.exchange.microsoft.com[131.107.1.27]: 450 4.7.1