12 Nov
2018
12 Nov
'18
5:53 p.m.
Doing some DNS digging it appears that amsat.org's DKIM records are invalid
(It's returning an SPF record).
(and it is a CNAME record, not a TXT record).
;amsat.org._domainkey.amsat.org. IN TXT
;; ANSWER SECTION:
amsat.org._domainkey.amsat.org. 3329 IN CNAME amsat.org.
amsat.org. 3260 IN TXT "v=spf1 a a: ip4:67.227.252.196 ip4:64.91.254.28
ip4:64.91.254.149 ~all"
vrza.nl publishes neither a SPF or DKIM record.
Further research indicates that Google doesn't necessarily mark every piece
of mail as spam if it fails spf and dkim checks.
Google uses the data as part of an algorithm to determine the "reputation"
of the sender. If the reputation is good despite failing SPF and DKIM
checks the mail will not be marked as spam.
*I apologize again for starting this thread*, It was based off of issues I
and another site were having with emails going to google users being marked
as SPAM. Turns out our hosting provider is using an old version of mailman
that doesn't incorporate more nuanced handling of SPF, DKIM, DMARC enabled
mail.
-Neil
-Neil
On Mon, Nov 12, 2018 at 4:05 PM Rob Janssen <pe1chl(a)amsat.org> wrote:
--
Neil Johnson
The subject
line of this message is clearly wrong.
255 of the 821 subscribers to this mailing list
use @gmail.com
mailboxes.
If there were a problem with gmail, it would have
shown up long
ago.
I have a bit mixed feelings about it. As a coordinator I get regular mail
from gmail users and often experience that my replies do not arrive or get
marked as SPAM. I get reminders about requests that I have already
processed,
and sometimes a message "oh sorry I found your reply in the SPAM folder".
At first I blamed my use of an @amsat.org address, and also using that
address
as a From: address in my replies. Due to the SPF record on amsat.org it
can be
expected that such use leads to marking of mail as suspicious.
So I switched to using another alias service (@vrza.nl being offered by
one of
our amateur radio societies), but the situation did not improve. I still
get
reports of my mail ending up in the SPAM folder at gmail. But the vrza.nl
domain has no SPF record.
Apparently there is some relation to the user receiving the mail. Some
users
receive all my mail without problem, no matter if sent from @amsat.org @
vrza.nl
or another source. Others report that it is treated as SPAM for each of
those.
Not being a gmail.com user myself, I do not exactly know what features it
offers
for whitelisting or other special treatment of mail, or maybe what it
learns
automatically. It could be that sending back and forth several mails
eventually
leads to an address getting on the whitelist automatically. The same
could be
true for mail server IP addresses (like a mailinglist server), and it
could be
that knowledge built in the past also affects the results of new SPAM
criteria
added later.
It is all a bit opaque, and when you want reliable and predictable mail
service,
using those mailservices certainly is not the best choice... or at the
least
check the SPAM folder regularly. (but I have also received reports of mail
being dropped and not placed there)
Rob
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