From: "Thorsten Schöning"
First of all you need to know where exactly the bottleneck is, often
it's related to DNS resolving for sending mails for example.

Yes, this is one bottleneck. However, the smtp server I am using for
bugzilla is used via other applications on our network company wide and the
delay is not present. I am not sure if it is some sort of configuration
adjustment that I can make within bugzilla?

The emails send out, but it just takes around 2 minutes to process
them/email them out.

We also have an exchange server... is it possible to send email through the
exchange server using bugzilla? If yes, how would I configure this?