OperaMail is still in the stone age as far as its interface goes! No HTML composition (even this review interface allows bold and italic!). Cannot import complete data from common existing email clients (E.G. Netscape/Mozilla). Cannot save emails without 3rd party software. And more...
OperaMail composition is very rudimentary, with only a 70s-80s interface (yes, I mean 70s, its just crude text manipulation, not even decent line/word wrap)
Add to this an arcane and ill-defined method of classifying mails (filters??) to obviate the need of folders. Give users (virtual) folders anyway.. they dont need to know they dont actually exist. Its a cleaner categorizing interface. After all folders/directories on operating systems are virtual.
Granted, Opera may be a very good browser, but its got a long way to go to be serious about todays email.
If Id known all this before I purchased Opera... But then, why should they advertise such obvious weeknesses? I purchased for value added, not just another browser!