Archive for May, 2009

The use of Subject lines – deprecated?

Wednesday, May 20th, 2009

I’ve recently started to see this trend more and more.  I’m receiving an increasing amount with mail absoltely no subject line.  And in some rarer cases, a totally inappropriate subject line.


ARP Spoofing – a lost art? Maybe not.

Sunday, May 10th, 2009

Just over a month back we had an incident where the default gateway on our servers would just sporadically stop responding, we first observed this as our servers sporadically just stopping to respond and only once we realized we could log on to other servers and during these “outages” we could still communicate with our servers via our other servers (ie, we could access them from the local LAN but not anywhere else) did we start pointing fingers at the gateway. (more…)

Temporary errors are NOT permanent

Friday, May 8th, 2009

I’ve had some complaints recently of greylisting generating bounces.  This should not be happening, so until this morning I made this off as total crap stories that people are pulling on me in order to once more receive their daily dose of spam.  As it turns out, however, there are in fact some large govermental organizations that believes that temporary errors are in fact permanent (And probably others too).


Getting a grip on greylisting

Friday, May 1st, 2009

So I’ve been wondering whether or not I should implement greylisting or not.  If I do, what’s the dangers and pretty much being rather nervous about the whole situation for quite a long while now.  Eventually one day (quite recently) I decided the amount of junk coming into my mail box again warranted some further action.  In particular I was getting back to the point where I was receiving 2 to 5 spam messages per day on a mailbox that has no spamassassin to protect it, only yes/no checks (the type that I prefer). (more…)