The mailing list for listmasters using Sympa

[Erik Olson <address@concealed>]

So I realize this is a bit late in the thread, but I thought I'd give a reply as there might be a bug.

I initially set the DMARC Protection on my lists to "Policy suggests rejection".  After a bit, I got some complaints from a few users that they weren't getting posts to the list.  So I changed the setting to "Policy suggests quarantine".  I have no idea if it worked for these users or not, but I left the setting.  It has been with THIS setting we get gmail rewrites. 

_dmarc.gmail.com.       600     IN      TXT     "v=DMARC1; p=none; sp=quarantine; rua=mailto:address@concealed"

It's true that gmail's policy is none, but gmail's subdomain policy is quarantine.  Does this mean that Sympa's DMARC algorithm is not distinguishing between whether the e-mail comes from "address@concealed" and "address@concealed" in deciding whether to do a rewrite? Would this be considered a bug or a feature?

  - Erik

PS: Would be interested in checking out your passive-aggressive shim, and curious how well the progress is coming on ARC in general.

On 5/3/2018 5:29 PM, John Levine wrote:

In article <address@concealed> you write:

FWIW, this appears to be true of gmail addresses now as well. :(

No, gmail.com still publishes a DMARC policy of "none".  Google.com on
the other hand publishers "reject" and has the same problems as
aol.com and yahoo.com.

If you hate DMARC I have a little perl shim that adds ARC headers (the
mostly done DMARC workaround for mailing lists) and does passive
aggressive From: header rewriting so this:

  From: Steve <address@concealed>

turns into this:

  From: Steve <address@concealed>

R's,
John

PS: Yes, the addresses work.

--
Erik D. Olson
address@concealed