CLIENT is Mad, Questions BC's status as up to date or fit for business

My Client is looking at the documentation for Email setup and said that it is WAY out of date and began to wonder if I'd steered him wrong to a company on the way out. He said, "Look at their mail documentations... Outlook 2010?????  iPhone 4??  Nothing about Mozilla Thunderbird , everything is out of date, are they really a credible venture??"

• Setting up Microsoft Outlook 2003
• Setting up Microsoft Outlook 2007
• Setting up Microsoft Outlook 2010
• Setting up Outlook Express
• Setting up Mac Mail version 3.2
• Setting up Mac Mail version 4.4 (Included with Mac OS X 10.6)
• Setting up iPhone 4 (with iOS 4.2)
• Setting up iPad (with iOS 3.2)
• Setting up iPad (with iOS 4.2)
• Setting up Android devices (with Android OS 2.1 aka Eclair)
• Setting up BlackBerry OS 6.0

http://kb.worldsecuresystems.com/kb/email-configuration-guide6.html

He is having trouble with his email programs and he is not a tech guru, but recognize his frustration in that there is nothing for Windows Live Mail setup or Windows 8.  He is also having a server issue with BC's mail in that it is blocking or losing mail from his earthlink account sent to his BC mail account.  He is a very busy business man and doesn't have time for hours on chat, and there is NO phone to call for a serious issue that could affect his business.  I narrowed down the issue to BC filtering or blocking emails from Earthlink's SMTP server but there is no way to diagnose further.  There isn't a spam folder to check. He whitelisted his earthlink accounts without success.  The problem is lost in the ether somewhere and there is no way to contact an accountable party to find a fix.  He spent hours on line with his Earthlink top tech person and they confirmed that mail is going out and not bouncing... 

Just saying, that if you want large businesses with multiple $$$ in sales, you have to have more direct support for serious issues like email malfunctions, and phone support, if nothing but to let them know that someone is working on it, should be essential.  I did what I could with Chat, but when it gets into the guts of the mail server, for instance, it is way out of my hands and I have no way of doing tech support.