Header settings and Gmail
Hi,
We operate a mailing list on which many members use their Gmail address. In the default settings, this results in a warning and delayed delivery (and maybe marking as spam):
status=deferred (host gmail-smtp-in.l.google.com[74.125.128.27] said: 421-4.7.28 Gmail has detected an unusual rate of unsolicited mail. To protect 421-4.7.28 our users from spam, mail has been temporarily rate limited. For 421-4.7.28 more information, go to 421-4.7.28 https://support.google.com/mail/?p=UnsolicitedRateLimitError to 421 4.7.28 review our Bulk Email Senders Guidelines.
As a preventive measure, it helps to use DMARC mitigation action with “Replace From: with list address” and “ DMARC Mitigate unconditionally ”. But now some users are unhappy with the From header " Username via Test-liste <test@test-liste.org>". They would rather have their email address in it.
Is there a solution with which Google delivers the mailing list messages without complaining, but the sender email address is also in the “From:”?
Thanks Erik
Hi,
We operate a mailing list on which many members use their Gmail address. In the default settings, this results in a warning and delayed delivery (and maybe marking as spam):
status=deferred (host gmail-smtp-in.l.google.com[74.125.128.27] said: 421-4.7.28 Gmail has detected an unusual rate of unsolicited mail. To protect 421-4.7.28 our users from spam, mail has been temporarily rate limited. For 421-4.7.28 more information, go to 421-4.7.28 https://support.google.com/mail/?p=UnsolicitedRateLimitError to 421 4.7.28 review our Bulk Email Senders Guidelines.
As a preventive measure, it helps to use DMARC mitigation action with “Replace From: with list address” and “ DMARC Mitigate unconditionally ”. But now some users are unhappy with the From header " Username via Test-liste <test@test-liste.org>". They would rather have their email address in it.
Is there a solution with which Google delivers the mailing list messages without complaining, but the sender email address is also in the “From:”?
Thanks Erik
On 7/29/24 12:28, erik@dante.de wrote:
Hi,
We operate a mailing list on which many members use their Gmail address. In the default settings, this results in a warning and delayed delivery (and maybe marking as spam): ...
The original of this duplicate post replied to at https://lists.mailman3.org/archives/list/mailman-users@mailman3.org/message/...
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
erik@dante.de wrote on 2024-07-29 12:28:
status=deferred (host gmail-smtp-in.l.google.com[74.125.128.27] said: 421-4.7.28 Gmail has detected an unusual rate of unsolicited mail. To protect 421-4.7.28 our users from spam, mail has been temporarily rate limited. For 421-4.7.28 more information, go to 421-4.7.28 https://support.google.com/mail/?p=UnsolicitedRateLimitError to 421 4.7.28 review our Bulk Email Senders Guidelines.
Is there a solution with which Google delivers the mailing list messages without complaining, but the sender email address is also in the “From:”?
I've found that setting this in Postfix's main.cf file to help: it sends each message separately, eliminating the "bulk" complaint:
default_destination_recipient_limit = 1
https://www.postfix.org/postconf.5.html#default_destination_recipient_limit
The default maximal number of recipients per message delivery. This is the default limit for delivery via the lmtp(8), pipe(8), smtp(8) and virtual(8) delivery agents.
There are related tuning options that may be worth investigating.
Great, this still works, thank you! Let's hope Google doesn't ban this trick too soon.
On 7/29/24 12:25, erik@dante.de wrote:
As a preventive measure, it helps to use DMARC mitigation action with “Replace From: with list address” and “ DMARC Mitigate unconditionally ”. But now some users are unhappy with the From header " Username via Test-liste <test@test-liste.org>". They would rather have their email address in it.
If your Mailman core version is >=3.3.9 you can add ^.*@gmail\.com to
dmarc_addresses (DMARC addresses in Postorius) to apply the mitigation
to gmail.com addresses instead of unconditionally, but this won't help
your gmail users.
Is there a solution with which Google delivers the mailing list messages without complaining, but the sender email address is also in the “From:”?
No. This is just one example of Google/gmail behaving oddly. gmail.com publishes a DMARC policy of none, yet they require incoming email From: the gmail.com domain to pass DMARC
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
participants (3)
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erik＠dante.de -
Mark Sapiro -
Ron / BCLUG