eM Client 10.3

Best E-mail service ever that synchronises with your Microsoft account.

Excellent Email client software! Extremely fast in sync as well as in finding emails within huge mailboxes! It literaly works equally fast, like being on gmail through the web. Nothing like Mailbird, Outlook etc, it is a very reasonably priced professional solution.

I also question the 'fully featured' as it lacks both an auto bcc (to ensure that the email actually went out - sometimes not the case with this email client) and a way to delay the sending of an email to a fixed time.