I'm a professional game developer from Wakefield, England, working for TickTock Games.
I'm a married father of five and I am also the director and lead programmer of Retroburn Ltd.
Martin 'Bytrix' Caine
All round web guy, games programmer and musician.
emailfacebooktwittermessengersteamxboxliveretroburn
Tags
2013 3d alphalabs amazon apple archivirtual asynchronous battlefield bad company 2 ben 10 bepu beta blackmagic design blog blue marble bootcamp borderlands bsp calibration charity charvel childsplay comments competition content tracker counter-strike crash csgo css3 cycling dear esther deferred deus ex develop conference direct x discipline documentation doom 3 bfg dr bott eidos elite force email deliverability eurogamer expo facebook focus fresnel game development game horizon game republic games gaming geoip global offensive grid guitar half-life 2 hawken hd7 hobbyist htc humble indie bundle imac indie indie trials indietrials intensity pro ip-countryside iron man 3 jamulus rift jquery kids kinect launch conference left 4 dead live lost mac mac osx manhacks mass effect 2 matrox maya minecraft mirrors edge montreal morrowind movies museum of the microstar music mxo2 mini mysql nausea network networking nokia normal mapping obj oculus rift omnitrix ouya pedal for pounds php physics playstation suite port25 portal portal 2 positron posters powermta project aedra project euler promotion properties proton pulse ps vita ps4 psn racer reddit rendering retroburn game studios reviews rift racer riftracer roadkill roller coaster shadow racers sharks shoct skyrifters snds space cadet spam trap star trek steam storage super stock sd1 fr team fortress 2 tesselating tesselation texture editor thunderbird thunderclap ticktock games tiga track builder track bulder trials tv twitter uk ultimatrix usergroup vequencer video vireio visual assist visual studio vorpx voucher vr vr cinema war thunder warren web windows 8 windows 8.1 windows phone 7 workbench wp7 wp7dev xbla xblig xblig network xbox xbox live indie games xna xnaukug xperia play zombies on the holodeck
Archive
Links
Web
XNA
Games
Email Deliverability
Tuesday, June 28th 2011 / Blog

Improving PowerMTA Domain Macros - Part Two

Now that we've identified the domain parts of all the MX servers we're hitting (from Part One), we can now move on to identify each domain which matches one of these groups of MX servers.

To start off, we'll choose the easiest, and the most common from my list, yahoo.com. The query below finds all MX server addresses (from dsnMta) containing the text .yahoo.com and strips the domain parts from all matching email addresses (rcpt). It then orders these with the most common domain at the top:

SELECT SUBSTRING_INDEX( `rcpt` , '@' , -1 ) AS `domain` , COUNT( * ) AS `cnt`
FROM `#database#`.`#table#`
WHERE `dsnMta` LIKE '%.yahoo.com%'
GROUP BY `domain`
ORDER BY `cnt` DESC
LIMIT 5000

The excerpt below is a sample of the query output when run against a sample of my own accounting data (note I have removed the volumes):

yahoo.com
yahoo.co.uk
btinternet.com
btopenworld.com
talk21.com
yahoo.co.in
yahoo.fr
yahoo.ie
yahoo.it
yahoo.es
yahoo.com.hk
yahoo.com.ph
yahoo.in
yahoo.com.sg
yahoo.com.cn
yahoo.com.tw
yahoo.de
yahoo.com.vn
yahoo.pl
rogers.com
yahoo.gr
yahoo.co.id
xtra.co.nz
yahoo.cn
yahoo.se
yahoo.com.my
onelist.com
yahoo.dk
yahoo.no
yahoo.co.th
structcon.com
yahoogroups.com
draxconst.com
gravelroots.net
omotade.com
tiggersabout.com
kehlconstruction.com
newyorkmarinecadets.org
byte2read.com
potterhousegiftshop.com
dothekaraoke.com

This output helps us identify a number of domains which all use yahoo.com as their mail exchanger. First, it helps us identify all the international TLDs which are being directed through the yahoo.com system and we can add those in to the domain macro:

domain-macro yahoo yahoo.com, yahoo.co.uk, yahoo.co.in, yahoo.fr, yahoo.ie, yahoo.it, yahoo.es, yahoo.com.hk, yahoo.com.ph, yahoo.in, yahoo.com.sg, yahoo.com.cn, yahoo.com.tw, yahoo.de, yahoo.com.vn, yahoo.pl, yahoo.gr, yahoo.co.id, yahoo.cn, yahoo.se, yahoo.com.my, yahoo.dk, yahoo.no, yahoo.co.th, yahoogroups.com

Now this leaves us with a number of domains which are not of the form @yahoo. These domains all use yahoo.com as their mail exchanger, but some are much larger than others. It's up to you to decide which of these domains you want to include in your yahoo domain-macro. Personally, I choose only to include those which are of any volume within our database. That means I can then include the following in my domain-macro:

btinternet.com
btopenworld.com
talk21.com
xtra.co.nz
rogers.com
onelist.com

I will not put the smaller domains in my yahoo macro as I don't want to make it entirely unreadable, and even if we have some email entering yahoo's system from another source the volume should be low so we shouldn't need to worry too much.

My completed yahoo domain macro now looks like this:

domain-macro yahoo yahoo.com, yahoo.co.uk, yahoo.co.in, yahoo.fr, yahoo.ie, yahoo.it, yahoo.es, yahoo.com.hk, yahoo.com.ph, yahoo.in, yahoo.com.sg, yahoo.com.cn, yahoo.com.tw, yahoo.de, yahoo.com.vn, yahoo.pl, yahoo.gr, yahoo.co.id, yahoo.cn, yahoo.se, yahoo.com.my, yahoo.dk, yahoo.no, yahoo.co.th, btinternet.com, btopenworld.com, talk21.com, xtra.co.nz, rogers.com, onelist.com

In the next part of this series we'll look at hotmail.com and gmail.com.


If you found this post helpful please leave a comment below:
 
Comments
0