Posfix making sense of delays in mail

The maillog is easy enough to follow, but when you understand what all the delay and delays numbers mean then this may help really understand what is going on!
A standard email entry in postfix looks like:
Jan 10 10:00:00 testmtr postfix/smtp[20123]: 34A1B160852B: to=, relay=mx1.example.lan[1.2.3.4]:25, delay=0.49, delays=0.2/0/0.04/0.25, dsn=2.0.0, status=sent
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Install ruTorrent on xbian

Install and configure apache server:
sudo apt-get install apache2 apache2-utils libapache2-mod-php5
Configure Apache
Enable auth_digest module for ruTorrent authentication, SSL, and reqtimeout.

sudo a2enmod auth_digest ssl reqtimeout
Open apache2.conf

sudo nano /etc/apache2/apache2.conf
Edit or add the following lines:

Timeout 30
ServerSignature Off
ServerTokens Prod

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Installing Ffmpeg on xbian

For App to be able to create thumbnails and previews for video and audio files uses ffmpeg.
These instructions are specifically for version 8.0 (Jessie) of Debian/xbian.
Configure APT
Note: the commands in this section must be run as root
Add the following to the bottom of /etc/apt/sources.list:
deb http://www.deb-multimedia.org jessie main non-free
deb-src http://www.deb-multimedia.org jessie main non-free
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If you nead, automated certificate expiration checks on CentOS Linux

One important part of using SSL is to keep track of expiration dates on certificates. Most client software will rightfully refuse to connect to a server that presents an expired certificate, resulting in interrupted services. For CentOS and other RHEL based distributions, the crypto-utils package contains a very useful utility called certwatch, which can be used to detect whether a certificate will expire in the near future. Read More

Yum Timeout Slow Connection

For this particular situation the ISP (will rename un-named) had burstable-bandwidth. However, that became an issue when attempting to do a yum update. Here’s the workaround that let us download the updates no matter what the bandwidth was:

nano /etc/yum.conf

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