Hello all, I have a simple MX query. If host A has an MX record
pointing to host B, is it the case that host B MUST have an address
record? The reason I ask is... (names changed etc)...
> exim -d9 -bv billy@???
Exim version 1.90 debug level set to 9
probably ndbm
Verifying: uid=0 gid=10 euid=1001 egid=10
Verifying billy@???
address billy@???
local_part=billy domain=hosta.ac.uk
domain is not local
>>>>>>>>>>>>>>>>>>>>>>>>
routing billy@???, domain hosta.ac.uk
deliver router called for billy@???
dns lookup: route_domain = hosta.ac.uk
DNS lookup of hosta.ac.uk (MX) succeeded
DNS lookup of hostb.ac.uk (A) gave NO_DATA
Actual local interface address is 127.0.0.1
Actual local interface address is 143.210.16.126
fully qualified name = hosta.ac.uk
host_find_bydns yield = HOST_FIND_FAILED (0); returned hosts:
hostb.ac.uk <null> 0 62 *
deliver router failed
billy@??? failed to verify:
all relevant MX records point to non-existent hosts
search_tidyup called
In the above case, host B is an MX for host A, but host B has no
A record, just an MX pointing to host C. (Host C does have an
address record).
I tried RFC 974 but I don't think it could help me. Can anyone clarify
the situation or point me at the relevant RFC?
Thanks for reading
Craig
_________________________________________________________________
Dr Craig Foster c.foster@???
Systems Management 0116 252 2245
University of Leicester Computer Centre Leicester LE1 7RH, UK
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