Hi, the root cause for the mailing list issues have been found.
trubka.network.cz gets greylisted by never tries to delivery the emails
again.
{{ Oct 4 13:17:46 mx2 postgrey[1652]: action=greylist, reason=new,
client_name=trubka.network.cz, client_address=2001:1568:b:145::1
Could you look into your MTA configuration to resolve this issue?
thanks,
Christoph
