Additional information, here is what rspamadm configdump dkim_signing returns:
duplicate symbol: CHECK_MID, skip registering
trying to add virtual symbol MID_BARE_IP as real (no parent)
trying to add virtual symbol MID_RHS_NOT_FQDN as real (no parent)
trying to add virtual symbol MID_MISSING_BRACKETS as real (no parent)
trying to add virtual symbol MID_RHS_IP_LITERAL as real (no parent)
trying to add virtual symbol MID_CONTAINS_FROM as real (no parent)
trying to add virtual symbol MID_RHS_MATCH_FROM as real (no parent)
trying to add virtual symbol MID_RHS_MATCH_FROMTLD as real (no parent)
trying to add virtual symbol MID_CONTAINS_TO as real (no parent)
trying to add virtual symbol MID_RHS_MATCH_TO as real (no parent)
duplicate symbol: MID_END_EQ_FROM_USER_PART, skip registering
init of /usr/share/grommunio-antispam/lualib/lua_ffi/spf.lua failed: /usr/share/grommunio-antispam/lualib/lua_ffi/spf.lua:71: size of C type is unknown or too large at line 35; trace: [1]:{[C]:-1 - cdef [C]}; [2]:{/usr/share/grommunio-antispam/lualib/lua_ffi/spf.lua:71 - <unknown> [main]};
*** Section dkim_signing ***
sign_networks [
"127.2.4.7",
]
*** End of section dkim_signing ***
