Problem with decoding/unzipping of tlsrpt+gzip from google.com

[logopk]

Hi,

I have enabled SMTP TLS Reports just today.

There has been only one report from google so far, but this one cannot be decoded. Besides some other DMARC that I haven't looked at yet.

dmarc-report-viewer | 2026-06-03T21:47:08.225265Z WARN Failed to extract report files from mail: Failed to extract XML from GZ attachment: Failed to read file from GZ archive: invalid gzip header
dmarc-report-viewer | 2026-06-03T21:47:08.233034Z WARN Found 122 mail(s) without report files
dmarc-report-viewer | 2026-06-03T21:47:08.233040Z INFO Extracted 1981 XML report file(s) and 0 JSON report file(s)
dmarc-report-viewer | 2026-06-03T21:47:08.298252Z WARN Found and filtered 63 duplicated DMARC reports!
dmarc-report-viewer | 2026-06-03T21:47:08.298266Z WARN Failed to parse 5 XML or JSON file(s) as DMARC or SMTP TLS report(s)

--000000000000a648cf065359e4e6
Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes

This is an aggregate TLS report from google.com

--000000000000a648cf065359e4e6
Content-Type: application/tlsrpt+gzip;
name="google.com!kreuser.name!1780358400!1780444799!001.json.gz"
Content-Disposition: attachment;
filename="google.com!kreuser.name!1780358400!1780444799!001.json.gz"
Content-Transfer-Encoding: base64

H4sIAAAAAAAAAHVQsWrEMAz9laLZCm7KHZynbqV7pyulGMcJpo4ULHlIQ/69JLkOLRxokJ6enp60
AJfBU/r2mpiQ/BjBwQvzkOPDK4UGDHReIxZPQwS3gKgvihumaSe3tj2jPaNt36x1e1zBQKTuDqt9
cqeLO12usBoITOqDYqKewYGMOqFmwRInLppoeB52M03gEQwcMKbuzuLPrxKrxNLslxiYOKeQooB7
X45i3o44MtR52rwR4w3ouVL3OzZjx6NPBA7+qK4GpI6jL7uUsvqMUkOIIn3NKFFk+2XgSgru0dwo
vU+5lvi/b9f1Y/0BG7nFJIcBAAA=
--000000000000a648cf065359e4e6--

The attachment decodes fine when I save it from Apple Mail.

What can I do to get this fixed?

Thanks.

Peter

[logopk]

Hi,

when looking at the code I have found that once you set eg.

IMAP_FOLDER_DMARC=INBOX.@Action.DMARC
and the same folder contains the TLS-Reports they will be ignored, unless you also set

IMAP_FOLDER_TLS=INBOX.@Action.DMARC
in unpack.rs:

    let expect_all = config.imap_folder_dmarc.is_none() && config.imap_folder_tls.is_none();
    let expect_dmarc_report =
        expect_all || config.imap_folder_dmarc.as_deref() == Some(&mail.folder);
    let expect_tls_report = expect_all || config.imap_folder_tls.as_deref() == Some(&mail.folder);

Shouldn't this be fixed? Or documented?

For now parsing of TLS-reports works.