I know it is an odd question. I have been using Outlook though for quite a number of years. My .pst file containing 17 year's worth of emails is just under 3GB in size. I have set up my mail account on claws mail on the pi-top, but, I'd rather have my RTF formatting for my emails.
Will Thunderbird run ok on the pi-top? should I use it or some other e-mail client instead?
I haven't converted the outlook mail just yet, but the pst file is on the pi-top waiting for a proper email client to be installed before it gets converted.