There is Zoho mail[1] - 1 domain, 10 users, 5Gb per user.
You can also try Yandex mail for domains[2] (1000 users and unlimited storage), but you will have to use Google translate to add domain - unlike mail itself, this pages are in Russian only[3].
You can also try Yandex mail for domains[2] (1000 users and unlimited storage), but you will have to use Google translate to add domain - unlike mail itself, this pages are in Russian only[3].
[1]http://www.zoho.com/mail/zohomail-pricing.html
[2]https://pdd.yandex.ru/domains_add/
[3]http://www.blogsynthesis.com/yandex-mail-setup-for-custom-do...