procmail, was autoresponding to Yahoo DMARC breakage

George Michaelson ggm at
Thu Apr 10 02:21:47 UTC 2014

Aside from a horrid config notation. the main problem for me has always
been getting sysadmins to include the changes which expose envelope-sender
and envelope-recipient to procmail. Thats not procmail, its the way
procmail is typically called. Without it, some stuff simply cannot be done
because you don't know the values passed by protocol, only the values
exposed in header.

(this may have changed. I don't use it any more)

On Thu, Apr 10, 2014 at 11:58 AM, John R. Levine <johnl at> wrote:

> On 4/9/2014 5:45 PM, George Michaelson wrote:
>>> procmail is a rewrite of MMDF mailfilter. badly.
>  Thanks, but I believe it slightly preceded MMDF's equivalent facility. On
>> the average, Allman put comparable features into sendmail sooner than I did.
> Procmail's user interface, if you can call it that, is beyond awful and
> looks like line noise.  But the code is great.
> Regards,
> John Levine, johnl at, Primary Perpetrator of "The Internet for
> Dummies",
> Please consider the environment before reading this e-mail.

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