[exim] Recommendations on RedHat RPMs or compile from source…

I am re-bulding an exim installation on RedHat 7.2/7.3 and wonder if anyone has any recommendations for which (of the available) RPMs to use and if there are any significant differences. I think I want DKEYS and most standard lookups. (no SQL needed, but, retain the ability to do LDAP although not used) or roll your own from the source?

Best

RB
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