I love emClient too! I think it's better than Outlook in many cases.
But still it is always very difficult to convince customers to abandon Outlook (sometimes also because they have integrations with their business software, and in these cases I understand them ...).
Gabriele Maoret - Head of SysAdmins at SERSIS
Currently manages 6 SmarterMail installations (1 in the cloud for SERSIS which provides services to a few hundred third-party email domains + 5 on-premise for customers who prefer to have their mail server in-house)