-GSSAPI does requires credentials to be acquired externally. In some
-situations, fetchmail cannot know the scheme will fail without trying
-it. In most cases, fetchmail should proceed to the next authentication
-scheme automatically, but this sometimes does not work.</p>
+GSSAPI that requires credentials to be acquired externally. In some
+situations, fetchmail cannot know that the scheme will fail beforehand,
+without trying it. In most cases, fetchmail should proceed to the next
+authentication scheme automatically, but this sometimes does not
+work.</p>