1. No reply-to address in Suirrelmail -> options -> Personal
information
I suspect messages replied back to her Squirrelmail messages were
trying to go to getenv.mydomain.com?
2. In the Squirrelmail conf.pl app, I had not entered the domain under
the domain settings - it had defaulted to getEnv[servername]
I have entered the proper entries in both of these areas...