RE: postfix/qmail best for message tracking through system

[Dave Sill]

"Mark Gebhardt" <[EMAIL PROTECTED]> wrote:

>Do you know if there's any way I can extend the VERP thing so that I can
>insert a unique message-ID into the return address or similar?

qmail-inject supports two kinds of VERP: per-recipient and
per-message. Per-recipient VERP's encode the recipient's address and
per-message VERP's encode the date and PID. The combination of
timestamp and PID is essentially a message ID.

-Dave