postfix to gmail silent delivery failure

PaulProgrammer

6/14/23, 5:22 AM

With the impending turndown of free hosted Google workspace accounts, I'm trying to install my own mail server using postfix/dovecot/opendkim. Mostly, it's working and for many of the services I've tried delivery is flowing.

However, when I send an email to a @gmail address, the google mx accepts the email, but it is silently discarded (never delivered to the target mailbox, no error reported).

PTR and A records are in alignment. Relays are disabled. I've got DKIM, SPF and DMARC all set up and working correctly. TLS is configured and available for all connections. RBL lists are clear. And of course Google support is not very responsive to an individual.

Is there anything I might have missed?

domain is w-w-williams.com -- my mx is m.w-w-williams.com. Test from CheckTLS TestSender service below:

SUCCESSFUL //email/test From:

Your email was sent securely using TLS.

TLS:    Successful
From:   [email protected]
Via:    165.227.22.201
Date:   2022-02-14 00:17:13 EST
Subject:    wetdhketjmjiv
SPF_mfrom.Record:   v=spf1 a:m.w-w-williams.com ~all
SPF_mfrom:  pass: local="w-w-williams.com: 165.227.22.201 is authorized to use 'w-w-williams.com' in 'mfrom' identity (mechanism 'a:m.w-w-williams.com' matched)"
SPF_helo:   none: local="m.w-w-williams.com: No applicable sender policy available"
DKIM:   pass: signature="@w-w-williams.com" result="pass"
DKIM_policy.sender: "o=~"(default), result="accept"
DKIM_policy.author: "o=~"(default), result="accept"
DKIM_policy.ADSP:   ""(default), result="accept"
DMARC_result:   pass
DMARC_disposition:  none
DMARC_dkim: pass
DMARC_dkim_align:   strict
DMARC_spf:  pass
DMARC_spf_align:    strict
DMARC_published.v:  DMARC1
DMARC_published.p:  quarantine
DMARC_published.sp: n/a
DMARC_published.adkim:  n/a
DMARC_published.aspf:   n/a
DMARC_published.rua:    [email protected]
DMARC_published.ruf:    n/a
DMARC_published.rf: n/a
DMARC_published.ri: n/a
DMARC_published.pct:    n/a

Thanks!

0 + 0

postfix

spf

dkim

dmarc

Nikita Kipriyanov

6/14/23, 5:39 AM

I didn't find any problems with your setup, except that I don't know your DKIM selector and therefore can't check there is a valid public key. Google is very strange in this area. I had a similar problem and nothing helped except using the relay which certainly works. I swear in your case this will suddeny work after some time too, when things "cool down".

PaulProgrammer

6/14/23, 5:42 AM

Thanks @NikitaKipriyanov. The selector is "email", and it is working according to several different test providers.

anx

7/11/23, 7:25 AM

Please add the relevant logs to your question, should look something like this: `postfix/smtp[10]: AAAAAAAAAAA: [email protected], relay=gmail-smtp-in.l.google.com[2a00:1450:4013:c00::1a]:25, delay=..., dsn=2.0.0, status=sent (250 2.0.0 OK 1234567890 abcd1233456 - gsmtp)` - just to rule out completely unrelated problems.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: postfix to gmail silent delivery failure

TH: postfix ไปยัง gmail การจัดส่งแบบเงียบล้มเหลว

RO: Postfix la eșec de livrare silențioasă a gmail

RU: postfix для ошибки автоматической доставки gmail

VI: postfix cho lỗi gửi thư im lặng của gmail

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