daemon/zulu.mit.edu@MIT.EDU is not a real e-mail address

[geofft]

I think the $kuser code in debathena-msmtp-config wants to do something different. I'm not sure what. Check that the tickets match a user account (or a nonlocal user account, per the logic a few lines later)? Strip the instance?

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[broder]

How is the right fix not something like this:

Index: debian/debathena-msmtp
===================================================================
--- debian/debathena-msmtp	(revision 24762)
+++ debian/debathena-msmtp	(working copy)
@@ -40,7 +40,7 @@
 
 sub from_address {
   # If we have tickets, use them
-  if ($kuser) {
+  if ($kuser && $kuser !~ m/\//) {
     return "--from=" . join('@', $kuser, 'mit.edu');
   }
   # Note that ATHENA_USER is explicitly not checked here. We've

We already know that $kuser is a valid Kerberos principal, and I think we can safely say that any principal with a null instance counts as a user who can send and receive mail, so all we need to do is check for an instance.

[jdreed]

Dupe of #806