On Tuesday 15 August 2006 10:46, Ole Nomann Thomsen wrote: > I run a qmail frontend for a FirstClass system. The qmail accepts mail for > about 500 domains, hosted on the FirstClass system, and scans them with SA. > In then injects them into FirstClass. If the domain is known, but the user > is > wrong (as in "[EMAIL PROTECTED]") the mail is rejected on > smtp-level by FirstClass. Qmail then generates a bounce back to the > original > sender. In case of spam, origninal sender is faked and we have backscatter.
Consider switching to qpsmtpd instead of qmail-smtpd, and use a real-time recipient verification tool, instead of living with QMail's 'accept everything, then bounce' methods. Or a plugin that can read a static list of valid users exported from FirstClass.
