I think it's quite simple -- you're doing this:

if ($fields{"TechEmail"} ne "")
[download]

To see if there's anything defined for $fields{"TechEmail"}, which, as you're checking it, must sometimes be false.

If you use "defined" it should go away:

if ( defined ($fields{"TechEmail"}) )
[download]

---

“Every bit of code is either naturally related to the problem at hand, or else it's an accidental side effect of the fact that you happened to solve the problem using a digital computer.”
M-J D