[OSM-talk] weird "excessive bounces" warnings from the list

[Nicolás Alvarez]

El mar., 2 de oct. de 2018 a la(s) 00:23, Paul Johnson
(baloo at ursamundi.org) escribió:
>
>
>
> On Mon, Oct 1, 2018 at 3:09 PM Tom Hughes <tom at compton.nu> wrote:
>>
>> On 01/10/2018 19:54, Richard wrote:
>>
>> > The messages go straight into a dedicated gmail inbox without any
>> > filters.
>> > As far as I know gmail will only ever reject messages that contain
>> > what looks to it like executable programs - attached files
>> > (*.exe, *.com, *.bat)
>>
>> It also rejects email from a sender whose SPF record tells
>> it to - that is a problem when mail is forwarded by a mailing
>> list because it no longer appears to come from a "valid" address
>> for the sender so services like gmail which believe SPF records
>> with a "hard reject" flag will reject the email, causing us to
>> see a bounce.
>
>
> Only if the sender is sending from a server other than their normal mail server, something readily detectable in the headers.  Google seems to use the same strategy as I did running my own mail server for about 12 years before moving to gsuite, which is, hey, not totally standards-compliant, since it'll go through DATA before deciding whether or not to accept or reject, but very workable to give the sender some idea what happened.

As far as GMail is concerned, the sender *is* sending from a server
other than their normal mail server. The email has @yahoo.fr yet it
arrived from OpenStreetMap servers. In addition the subject and body
got modified ([osm-talk] in subject and unsubscription instructions at
the end).

Your email got marked as "dkim=neutral (body hash did not verify)",
but messages from Yahoo are treated more strictly because Yahoo
publishes DMARC records requesting recipients to be more strict, which
is somewhat incompatible with mailing lists.

See: https://www.linuxchix.org/content/mailing-list-changes

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Nicolás