Again tried to reply via mail (to b70faff6c167ccb6afccd30030a93f84@discourse.osgeo.org), got
smtp; 454 4.7.1 <5363c714423af08e3623a64fbd1aa35c@discourse.osgeo.org>: Relay access denied
again.
EDIT: realizing that this is probably a copy of a bounce of yesterday.
But I got a bounce of THIS mail also.
Apparently the server is thinking that it is relaying mails?