Networking issues, Norton Firewall

This information came from one of our customers struggling with internet and networking functionality in Campground Master:

I thought I would let you know how I resolved my problems getting the networking working and also the problem with sending email confirmations.

Both issues were caused by my Norton Antivirus/Firewall software. It seems that Norton will scan your outgoing emails as well as incoming emails. The scanning of outgoing emails is incompatible with Campground Master (if the modem disconnects after sending the email).  I had to turn that feature off. Also, on my master computer, I had Norton Personal Firewall running which made setting up the network aggravating.  Even when I got the network going, the emails still wouldn't work from the master computer. I ended up removing the Firewall program and letting Windows XP do its firewall thing.

Our response:

The Windows firewall and various "security" programs have been giving people all kinds of problems with networking (blocking the TCP/IP port of Campground Master), but we hadn't heard of it being a problem with sending E-mail.