5166 sendmail package should be replaceable

@@ -120,12 +120,13 @@
 "
 fi
 
 if [[ -z $email ]]; then
         my_id=$(id -un)
-        my_checkhostname=$(check-hostname)
-        my_fqhn=${my_checkhostname##* }
+        my_hostname=$(hostname)
+        possible_fqhns=$(getent hosts $my_hostname | cut -f 2-) 
+        my_fqhn=`for i in $possible_fqhns; do case $i in *.*) echo $i; break;; esac; done` 
         email="$my_id@$my_fqhn"
         echo "No e-mail address provided, defaulting to $email"
 fi
 
 if [[ -z "$name" ]]; then