More aggressive spam filtering

There have been many changes made to Nabla Design’s main e-mail server tonight to reduce the already small amount of spam our customers get. Some of these measures include:

• SMTPd-side RBL checking against fairly conservative RBLs: previously we were relying on SpamAssasin’s RBL checking only
• HELO filtering
• Greylisting
• Sender Policy Framework checking

Our setup so far has been running without problems. If you do encounter a problem please contact our technical support.