WREN’s at Station X
Telnet 25 - checking email connections
Debugging MailScanner: cleaning messages
Last week I did a short post on testing MailScanner to be sure it was scanning properly. An alert reader pointed out that I missed the easy solution, which was to simply use ‘MailScanner –lint’ to check if MailScanner was running properly. Since I wrote that article, I found that my MailScanner was again hogging the CPU. Last time it was an issue with f-prot interaction, this time it is a problem apparently with MailScanner. Here is what I did to debug this issue, and here is the post that helped me learn more about MailScanner.
Email status messages - what do they mean
With one of my clients I need to monitor email bounces from our mailing lists. Normally this goes relatively smoothly, as either the email goes through, or it bounces back with a 550 Recipient not found message. Sometimes the messages I get back are less familiar to me. Here is the appendix from RFC1893.