New mail in old thread does not show in web

It seems the web interface to the mailing lists, or so called "forum" does not show new messages to old threads.

I've wrote via mail to an old thread and it is visible in the archives, [1] but on in the web [2] interface.

I suspect this has something to do with spam protection. If so, please close the bug, although it is not convenient. Thanks.

[1] http://listas.trisquel.info/pipermail/trisquel-users/2012-October/012918.html
[2] https://trisquel.info/en/forum/critical-bug-need-your-help-fixing