Comment My spam fighting recipe and some theories (Score 1) 597
I have a similar setup, but got tired of content filters at the MTA level. My solution was to configure Postfix (my MTA) to abide more closely by RFCs (specifically for ELO|HELO commands) and install postgrey (`aptitude install postgrey`). Of course ensure you're not an open relay.
These measures decreased the number of spam arriving at my inbox by 90%. The spam that reaches my mailbox is handled by my MUA (Mail.app currently). The volume is low enough for me to check if its working. It does! As it was already commented read your mail logs... they make a fun read!
As for your sudden decrease of mostly spam incoming emails, some theories:
1. Some big telco closed port 25 for residential customers?
2. The recent DNS saga called sysadmins around the globe to check their servers and apply security patches and perhaps close open relays.
These measures decreased the number of spam arriving at my inbox by 90%. The spam that reaches my mailbox is handled by my MUA (Mail.app currently). The volume is low enough for me to check if its working. It does! As it was already commented read your mail logs... they make a fun read!
As for your sudden decrease of mostly spam incoming emails, some theories:
1. Some big telco closed port 25 for residential customers?
2. The recent DNS saga called sysadmins around the globe to check their servers and apply security patches and perhaps close open relays.