[Mailman-Users] DMARC and Reply-To lines with from_is_list munging.

Mark Sapiro mark at msapiro.net
Sun May 11 06:08:26 CEST 2014

On 05/10/2014 02:07 PM, Peter Shute wrote:
> Thanks for clarifying that. Someone pointed out that their iPhone handles it ok, but that it's an extra step to open the wrapped message. Same on my iPad, but the wrapped message then opens in an iPhone sized window. Better than nothing, but very inconvenient for long messages.

When on April 6 I enabled Wrap Message on my lists I started to get
these kinds of complaints. Some who had this experience were OK with
adapting to it, but others didn't want it so after a day or so with Wrap
Message, I went to Munge From. Now I see occasional misdirected replies
from users whose MUAs apparently don't always handle the Reply-To: correctly

In fact, my own Apple Mail 4.2 on OS X 10.6 is randomly broken. I don't
use this MUA regularly, but I have it on one machine, and when I look at
messages from my lists, it will sometimes display the Reply-To: header
and 'reply' will be addressed to the addresses therein. Other times, it
will not display the Reply-To: header and 'reply' will be addressed to
the address in the From: header, yet if I examine the raw headers, the
Reply-To: is there and I have so far not been able to determine what the
difference is that makes it fail to 'see' the header sometimes.

Bottom line - all these mitigations have issues for reading, replying or

Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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