thought about slim php framework
Is plain old PHP just too easy? It's between 1 and 5 lines of code without a framework depending on the security model.
can this be done easily with a node.js or any other cloud solutions?
Oh dear. You've been sitting too close to the sales people. node.js is not a "cloud solution". Yes node.js is quite capable of doing this, as is ASP, Java, Python, .NET, Perl, bash..... IMHO it's more difficult with node.js than with PHP - since you need to configure the node.js as a webserver and add libraries to support SMTP.