The manager didn't even comprehend why it was a bad configuration. She's like "What's the problem, can't you log in?"

"I can, but only if I send mail from my @verizon account. It's a totally non-standard way of doing email. I mean..it's not even that it's an opinion on my part, it is clearly the worst possible way of doing something out of a number of equally effective, yet better, options."

She still didn't get it, so I'm like

"Okay, lets say my clients had a domain name, ninjaconstruction.com, and they want to send an email using that account. With this configuration, they can't. It's not possible for them to use Verizon's mail server, which they pay for AND have legitimate authenticated access to, to send this email. They can't send it directly because all of Verizon's DSL range is either blacklisted or you firewall it yourselves."

"That's not our problem."

"Again..is this actually business service? Do you have anybody working there that's ever used the internet?"

It went downhill from there : /