Andrew Staples wrote:
3. Change company policy to reflect names like xx.yy@us.groupname.com, xx.yy@uk.groupname.com, etc, where DNS would resolve to the correct server. Doesn't give corporate the "email image" they are after.
4. Change robustness level at group HQ for relay to individual mail servers...we need a solution in my lifetime.
if you want a 'flat' public domain name space for the company, then these are your only options. as you note, #3 is a noisy heuristic, not a solution. my own view is that <sub>.company.tld (eg, us.example.com or jp.example.com) still retains essential identity homogeneity. but it's not unreasonable that an organization would want it *entirely* homogeneous. unfortunately, all public routing to email servers is based only on domain names, so the domain name has to contain differential information if differential routing is needed. ldap can only be a factor after the mail server gets the full email address. d/