MIME::Lite

[Dirk Koopman]

Chris Jack wrote:
>  
> A perl question!
>  

Actually, probably an MTA configuration question.

> Someone on the $email_list left the company, their email address became defunct and the above section of code failed. Taking them out of the distribution list made the code work again.
>  

Many people have their MTAs check each recipient's address, it is likely 
that any (local) errors may make the whole thing fail (quickly).