[Mailman-Developers] VERPing: ouch!

[Dan Mick]

Fil wrote:
>>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

I've been doing Postfix VERPing for years.  It's a really small change 
to the sendmail invoker (it already had a variable to hold 'options' or 
some such.)