[Mailman-Developers] VERPing: ouch!

[Fil]

> For example, it might be faster/lower overall load on the server if we had
> the MTA do the VERPing for us -- we're pretty sure that's supported by
> some MTAs (e.g., at least some versions of Exim), and we know it's faster
> for at least some of them (e.g., Exim).

Sorry, for postfix indeed it might be much easier to do it this way:
http://www.postfix.org/VERP_README.html#smtp

the only change between non-verp and verp call to the SMTP server is to
replace
        MAIL FROM:<sender at domain>
by
        MAIL FROM:<sender at domain> XVERP=+=

-- Fil