Fix ldap_route `null’ in sendmail 8.14.4

I’ve got a sendmail setup with ldap_routing, it’s very convenient if you’ve got a distributed sendmail environment, in my case I’ve just got ldap_routing for mail hosts and not for addresses, so it’s expressed in the following form in

When upgrading my sendmail platform to the new Ubuntu 12.04 LTS (Precise Pangolin) I’ve found the following error:

This is due to a change in behaviour in ldap_routing.m4 in 8.14.4, it’ll try to automatically add  -T<TMPF> which breaks the special `null’ behaviour.

The way recommended to fix this is to replace ldap_routing.m4 with the version from 8.14.3 which is available here.

In my case (Ubuntu) I just had to replace the file located at /usr/share/sendmail/cf/feature/ldap_routing.m4, then process again and everything went back to normal :)

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