Ok, we all encountered at least one request to change MX entry and separate mailserver from webserver. That's all fine, we all know how to do it.My problem here is this... let's say I put a site on shared hosting with 1GB free space. Occupation of resources is somewhere around maximum. 1018MB/1024MB used. Would mailserver slow down webserver and impact on web site speed?Are thoose two separated although I'm on shared 1GB hosting, would this near quota disk usage have anything to do with webpage? 
Change MX record - separate mailserver from webserver
web hosting;page speed;mx
What is bandwidthIn its most basic definition, bandwidth describes the level of traffic and data allowed to travel and transfer between your site, users, and the Internet. Each web hosting company will offer a particular level of bandwidth. This is often a good indication of which hosting companies have the best of three essential components: Networks, connections and systems.Usually, the more bandwidth a web host can provide, the faster and the better these three factors will be.  At the same time, you should try to avoid attractive-looking unlimited bandwidth offers, as these are often not what they seem (more on this point later). Unmetered bandwidth should be more along the lines of what you are looking for.Bandwidth and the Relationship With Web TrafficLets use another analogy to help make bandwidth clearer. In this example, the bandwidth is the number of tables in a restaurant, and the web traffic is the diners. The math is simple: The more tables in the restaurant, the more patrons can dine there at any one time.My OpinionSo generally it does impact on your page performance, and especially the load time of your website, in my opinion.Also separating your mail server from your web server may be a good decision when you get into situation of receiving 70000 spam mails in the frames of 1 hour, because spam mails are quite common.