Does Gmail ignore sending / discard DSN caused by rejects?

[Jean-Michel Brünn]

Hi there,

I've setup amavisd-new with amavisd-milter (amavisd-new 2.11.1,
amavisd-milter 1.7.1, Postfix 3.5.6).

I'm using D_REJECT for $final_virus_destination. If I use telnet I can
see that it does reject correctly:

    Connected to mail.no-uce.de.
    Escape character is '^]'.
    220 mail.no-uce.de ESMTP Postfix
    EHLO example.com
    250-mail.no-uce.de
    250-PIPELINING
    250-SIZE
    250-VRFY
    250-ETRN
    250-STARTTLS
    250-ENHANCEDSTATUSCODES
    250-8BITMIME
    250-DSN
    250-SMTPUTF8
    250 CHUNKING
    MAIL FROM:<someone at example.com>
    250 2.1.0 Ok
    RCPT TO:<himself at jeanbruenn.info>
    250 2.1.5 Ok
    DATA
    354 End data with <CR><LF>.<CR><LF>
    << EICAR SIGNATURE HERE >>

    .
    *554 5.7.0 Reject, id=06986-07 - INFECTED: Eicar-Signature*
    quit
    221 2.0.0 Bye
    Connection closed by foreign host.

So that seems to work.

If I use my gmail address and send an E-Mail from gmail to my server I
can see it rejected in the logs:

    Aug  8 01:00:00 mail amavis[6987]: (06987-07) Blocked INFECTED
    (Eicar-Signature) {*RejectedInbound*}, AM.PDP-SOCK [209.85.208.41]
    [209.85.208.41] <xxx at gmail.com> -> <himself at jeanbruenn.info>,
    Queue-ID: C2D7113F99D, Message-ID:
    <CAHJLFye_NLns9UekM=mEXNxbb8EfyXbO0a7+N99kyQQtPXLqYw at mail.gmail.com>,
    mail_id: QNMup7dScVzw, Hits: -, size: 3173,
    dkim_sd=20161025:gmail.com, 462 ms
    Aug  8 01:00:00 mail postfix/cleanup[7313]: C2D7113F99D:
    milter-reject: END-OF-MESSAGE from
    mail-ed1-f41.google.com[209.85.208.41]:*5.7.0 Reject*, id=06987-07 -
    INFECTED: Eicar-Signature; from=<xxx at gmail.com>
    to=<himself at jeanbruenn.info> proto=ESMTP helo=<mail-ed1-f41.google.com>

(and no, xxx@ is not my real gmail address :-))

So that seems to work as well.


But: I never get anything (DSN?) in my gmail mail. So I'm wondering if I
configured something wrongly on my side or if google just discards some
specific DSNs.

If I send an E-Mail from gmail to a non-existing mail address I get a
message in my gmail inbox, that that address does not exist.

I was searching in all folders of that gmail web account but I couldn't
find it anywhere.


I'm curious: anyone else observed this behavior with gmail? If google
does not inform their users about mails that were rejected, this might
be very problematic, hence I'm a bit confused and wondering if I
configured something wrong.

Jean


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