I am looking for an email client which offers seamless integration of (offline) mails when used from linux (ubuntu 12.04) and windows 7. Being a windows user till now, I have been using Outlook and have couple of accounts configured in it, and then there are some backup .pst files created using outlook in windows.
going forward, i would be using linux most of the time and was wondering if there are good clients which work like outlook - offering offline viewing of emails, and backing up in formats like pst. I know linux maynot use pst to backup email files, but was wondering if this can be achieved.
basically, i will be using mail client most of the time in ubuntu to read and archive emails. now, when i log into windows for other work, i want to be able to access the same offline mails and archive emails from there as well, and any new mails that i download/send from within windows should be synchronised so that when i log in to ubuntu later i can easily resume with email works without any additional sync.
hope the requirement is clear. please suggest a mail client compatible for such use with both ubuntu and windows.