Newly created filters do not run automatically only when running manually.

When the filter type default settings were introduced in New Filter Properties:

(Getting new mail, after junk classification, when archiving, after sending)

the "getting new mail" flag was falsely linked to inverted "Run Manual" - both
are 2 separate options.

The "incoming" flag is composited from InboxRule + NewsRule (bit1 and bit3) -
if neither of these bits is set the rule will not be executed automatically. A
typical flagset would be 224 (0x11100000) - typically a mail (not newsgroup)
filter would have bit1 set sp wuld result in an odd decimal value.

https://dxr.mozilla.org/comm-central/source/comm/mailnews/base/search/public/nsMsgFilterCore.idl#11


  const long None             = 0x00;
  const long InboxRule        = 0x01;
  const long InboxJavaScript  = 0x02;
  const long Inbox            = InboxRule | InboxJavaScript;
  const long NewsRule         = 0x04;
  const long NewsJavaScript   = 0x08;
  const long News             = NewsRule | NewsJavaScript;
  const long Incoming         = Inbox | News;
  const long Manual           = 0x10;
  const long PostPlugin       = 0x20; // After bayes filtering
  const long PostOutgoing     = 0x40; // After sending
  const long Archive          = 0x80; // Before archiving
  const long All              = Incoming | Manual;

Created an attachment (id=8569) [details]
3.7.1 prerelease 15

Added a merge feature when importing filters - if a matching filter (same name)
is found it replaces the original. 

this does NOT check for modifications (and cannot check the date) so it won't
prevent a NEWER filter to be overwritten by an older version of it. 

To fix the  "broken" filters, first export everything - then using a JSON
editor (such as notepad++) delete all filters that have an "odd" filtertype,
e./g/. 

   "filterType": 17,

. If you are deleting the last element, make sure the array (and file) ends
without a comma, like this:
        }
      ]
    }
  ]
}



keep all filters with an even value such as 
      "filterType": 224,

... replace the even numbers with 17 (for instance) and save. reimport the
file. A popup will briefly show how many filters were successfully replaced.

17 = runs on import (before Junk classification) & when running Manually

Created an attachment (id=8572) [details]
3.7.1 prerelease 41

Added a button for fixing the problematic filters.

Created an attachment (id=8573) [details]
3.7.1 prerelease 42

Updated internal default version number to show correct change log.

Created an attachment (id=8574) [details]
3.7.1 prerelease 54

Added fix for filters in local folders (it turns out they also have the
InboxRule flag set by default) and notifications on results.

Fixeed in release 3.8 on 1/1/2019