:openstreetmap:257:\000\005\151\163\163\165\145\154\145\164\163\145\156\143\162\171\160\164\056\157\162\147
-# Make the virtual machine the primary MX with Bytemark as backup
+# Make the virtual machine the primary MX
@openstreetmap:212.110.172.32:a:10
@noreply.openstreetmap::a.mx.openstreetmap:10
'openstreetmap:v=spf1\040ip4\072212.110.172.32\040ip6\0722001\07241c9\0721\072400\072\07232\040mx\040-all:86400
'otrs.openstreetmap:v=spf1\040ip4\072212.110.172.32\040ip6\0722001\07241c9\0721\072400\072\07232\040mx\040-all:86400
+# Announce MTA-STS policy
+
+'_mta-sts.openstreetmap:v=STSv1;\040id=202001281902Z
+
+# Delegate MTA-STS policy for subdomains
+
+C_mta-sts.noreply.openstreetmap:_mta-sts.openstreetmap
+C_mta-sts.otrs.openstreetmap:_mta-sts.openstreetmap
+C_mta-sts.messages.openstreetmap:_mta-sts.openstreetmap
+
# Google postmaster tools verification
Caf323lytato5.openstreetmap:gv-o4v3qh5pfayqex.dv.googlehosted.com