The SVN version of formencode has a bug fix for a serious bug in 0.7.1 that causes the Email validator, when verifying domains, to reject many perfectly OK email addresses. (It was my bug, alas.) The attached is identical to 0.7.1-r1 except for patching this one issue with the code in SVN. Reproducible: Always
Created attachment 132093 [details] ebuild for formencode 0.7.1 that invokes patch
Created attachment 132094 [details, diff] patch for email DNS bug
This is fixed in formencode-0.7.1-r2, thanks for reporting ;)