Hi! It has been fixed now. It seems there was a mistake in letsencrypt configuration.
Aki > On 13 February 2018 at 17:49 Aki Tuomi <aki.tu...@dovecot.fi> wrote: > > > I'll look into it. Something has failed. > > > ---Aki TuomiDovecot oy > -------- Original message --------From: Marc Weustink <m.weust...@cuperus.nl> > Date: 13/02/2018 17:44 (GMT+02:00) To: email@example.com Subject: > Certificate of package repository expired > Hi, > > I just happened to do an apt update and got a notice that > repo.dovecot.org was disabled. > > According to firefox: > repo.dovecot.org uses an invalid security certificate. The certificate > expired on dinsdag 13 februari 2018 12:48. The current time is dinsdag > 13 februari 2018 16:39. > > > Thanks, > Marc