Another warning
Another word of warning.
I have recently been doing some business with a perfectly reputable chain of Estate Agents in the UK, but they complained that every time they tried to email me the email bounced.
Tracking down the cause revealed that their email was hosted by clara.net, but because someone (not them) has used a clara.net account to send out spam, my ISP has clara.net on one of its blacklists, so all email from anyone on a clara.net server gets bounced. Not good for business.