One of the most important compatibility factors to consider with email is the mobility question. How often do your employees need to access email via mobile devices? That's an important issue because most email hosting providers deliver some kind of web client usable as a default inbox. Almost all of these can be accessed via a mobile device, so if your employees don't need to access their emails on the road that much, then such mediocre clients are probably fine.
The reason I ask is due to Barbara’s question about changing email provider as she has her own business domain, a web site and emails ending (say @xxx.com). If she changed email provider then using your analogy, then the hard-working mail team might be a team of contractors handling all her mail and then if she changes to a different provider then that would be equivalent to the old team being fired and new team of contractors put in their place. So same address, same building, same mail boy delivering it to your desk but a new mail room team. Would that be correct?
A personalised email address on your domain like [email protected] increases the value and perception of the professionality of your business to customers and prospects. While free email services offered by Google, Yahoo, etc. are fine for personal use, a custom email address will prove that you are a professional or legitimate business. If you already have a hosting plan with one.com, your personalised email address comes as part of the hosting package completely free of charge.
Our aim is to keep our servers clean from malware, phishing, and other malicious activities posing threat to Internet users. It does not mean that we judge before knowing you, but today's reality is that we can not predict intentions of every user who signs up. In order to prevent misuse of our services we had to apply certain limitations to free hosting accounts. In turn our servers are never blacklisted so you can always expect your email message to reach it's recipient, and Internet users to reach your website.