[opendmarc-users] DMARC reports in ZIP format

[Marco Moock]

Hello!

While analyzing rejected DMARC report mails generated by
opendmarc-reports v1.4.2, I noticed that they are generated in zip
instead of gzip.
Some sites reject zip at all.

|The aggregate data MUST be an XML file that SHOULD be subjected to
|GZIP compression.
[...]
|The extension MUST be "xml" for a plain XML file, or "xml.gz" for an
|XML file compressed using GZIP.

Is there a special reason for using zip here?

-- 
kind regards
Marco