The free acount at fastmail gives you a whopping 10 Mb of space, ability to view the messages offline with a mail client, that too with the advanced IMAP protocol... and you also get unlimited filters and the list goes on... and the best thing is that they have scores of domains to choose from!!
They have various paid options too, basic membership is only around $15 LIFE TIME PAYMENT... for which you get 16mb of space, unlimited filters, a notepad, advanced antivirus facilities, free aliases etc...
They have other paid options too based on the usage.. for more info visit https://fastmail.fm