I have a client who runs SBS2008 on premise. The most used features of this installation are email and file share (i.e, sharepoint is unused, etc).
Every now and then the internet will drop (ISP's got wire issues in the area, plus power outages frequent during bad weather). When the server goes down email is lost/bounced, etc. The problem occurs because of clients' location - small town remote.
So, what's the best way to make their email redundant? I hate using the POP3 connector as a permanent solution... and took them off of that kind of setup. I don't think dropping exchange and going to hosted pop3 is gonna fly as EUs all use multiple devices. Might not be able to sell them on a migration to the cloud, due to unreliable internet. Kinda painted into a corner here.
I was thinking something along the lines of changing MX records at the host, adding a secondary server and using priorities on the MX records? In testing I never got it to work.
Please send your ideas/best practices.