GitHub user sebbASF opened an issue:
https://github.com/apache/incubator-ponymail/issues/84
Bug: emails allocated to wrong month
Emails which are sent within a few hours of the end of a month may be
incorrectly allocated to the subsequent month.
For example, the earliest emails in the following mbox should be in the May
2015 chunk.
https://lists.apache.org/[email protected]:2015-6
The displayed timestamp shows the date 2015-05-31 (assuming that the local
TZ is no further east than GMT+1)
These mails were uploaded from a file, if that makes a difference.
It looks like the mails were allocated to a month based on a local timezone
at least 2 hours before GMT.
It does not make sense to use the local timezone for this. The database
should work in UTC only.
If necessary, the display can show times using the local timezone, but the
underlying data should only be stored in UTC.
I found one place where localtime is used in the backend code:
https://github.com/apache/incubator-ponymail/blob/master/tools/archiver.py#L274
This would probably cause the upload issue.
See also https://issues.apache.org/jira/browse/INFRA-12079
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