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- PHP 5.4 Remote Exploit PoC in the wild, (Sat, May 19th) May 19, 2012
- ZTE Score M Android Phone backdoor, (Fri, May 18th) May 18, 2012
- ISC StormCast for Friday, May 18th 2012 http://isc.sans.edu/podcastdetail.html?id=2545, (Fri, May 18th) May 18, 2012
- ISC Feature of the Week: Tools->Information Gathering, (Thu, May 17th) May 17, 2012
- Steam
Tag Archives: SMTP
Email Greylisting
First, for the un-initiated, click here to learn about email greylisting.
When email admins talk about greylisting, one of the benefits they normally point to is load on the actual email server but fail to mention supporting systems. I did notice a decrease in mail processing load there as well as my database server.
Keep in mind this is NOT a busy email server. It’s only hosting a couple TLDs.
I noticed an immediate improvement after restarting mail services (I did not reboot the server).
Spam Bashing
We finally have our spam filtering back in place at kulish.com. We’ve set it to a semi-aggressive filter where pretty much every incoming email is marked with a spam score.
We’re using the postfix+amavis+clamd+spamassassin setup.
While we’ve been doing without it for a few months (using client side stuff until I found time), I still don’t remember it working this well on the last server install.
Here’s a wopper of an email, just after the installation and testing were completed. The receiving parties and server names have been sanitized to protect the marginally innocent (**PROTECTED**).
SASL Screws Mail Admins (AGAIN)
It seems that the SASL developers are still hard at work *censored*ing things up. Well, actually, I don’t think they have to work very hard at it. It seems to come natural to them.
After upgrading the SASL libraries on my email server, SMTP authentication is refusing to work.
I found a few tidbits of information, but no fixes.
I found this email that says I have to grab a cvs snapshot. They have GOT TO BE KIDDING! Sadly, they are not. Time to replace some project managers and developers here. They obviously haven’t a clue what they are doing.