Repository Problem

["Stephen P. Molnar" <s.molnar@sbcglobal.net>]

I have just installed Stretch on a new SSD on my platform.

During the installation I selected the University of Chicago mirror and 
accepted the defaults plus backports.

When I fun apt-get install Thunderbird apt-get tries to log on to 
prod.debian.map.fastly.net (2a04:4E42:2c::2040 and hangs. I can't find 
that address anywhere in /etc/apt.  Why am I getting this behavior? Even 
more important, how do I get rid of  the problem?

It is critical as my wife uses Thunderbird for her email.

Any assistance will be greatly appreciated.

Thanks in advance.

--
Stephen P. Molnar, Ph.D.
Consultant
www.molecular-modeling.net
(614)312-7528 (c)
Skype: smolnar1