infinite loop when smtp server unreachable

[GoogleCodeExporter]

I'm seeing the same behaviour as noted in issue 66 it should be noted however 
that I'm getting it in an MVC 5 + Web API 2 project.
My comment added to issue 66:

Interesting that this should have been marked as invalid because I'm seeing 
exactly the behavior described.
I have localhost configured for SMTP but that only works for my production 
environment.
Meanwhile I was debugging another issue on my workstation which by first 
receiving a different exception lead to this SMTP infinite loop exception.
I realize I could make this go away by changing config for debugging etc. I 
don't believe that an infinite loop is acceptable under any condition.

Original issue reported on code.google.com by [email protected] on 6 Aug 2014 at 9:16