Spam backscatter

Over the past couple of weeks I’ve started getting messages like this from the SourceForge:

Your membership in the mailing list whatever has been disabled due to excessive bounces The last bounce received from you was dated 15-Sep-2007.

It’s true – the systems that handle my mail do generate a number of SMTP time rejects for open posting SourceForge lists. My mail server does SMTP time rejection of some spam and these lists don’t appear to have much in the way of spam filtering. It’s a bit depressing since the main problem appears to be limited filtering on the SourceForge side which renders the lists in question rather difficult to read but it’s unsurprising given the nature of the service.