jabber.org operators here? > Establishing a secure connection from mdosch.de to jabber.org failed. Certificate hash: c069b1a830d5e6d05a662648eae6f4e03de17e36658af1a33be3d88a3217c943. Error with certificate 0: certificate has expired.
https://github.com/stpeter/jabberdotorg/issues/15