At my work place I have to setup our own mail service on cloud servers(ubuntu). Before that I have to try it on my local servers(home), but I have dynamic public ip address assigned from ISP. I'm thinking to go for cloud servers with a static public ip. Does anyone know a cheap cloud service provider so that I can use it for about a month. As I'm going to just install and configure only mail services and that is also only for a short while, it's even better if have to share someone's cloud or something which is already setup so that I can cut the costs as much as possible.