You get the recommended fee by not overriding it with -paytxfee or settxfee. By default, Bitcoin Core will automatically set a fee to try to ensure your transaction will probably confirm within the next 2 blocks; the number of blocks can be changed with the -txconfirmtarget option. You can query the current fee estimate at any time with the estimatefee n command, where n is the desired confirmation time in blocks (this fee is per kb).

That statement makes no sense. Microtransactions constitute very low volume, and current high-volume transaction networks do not handle microtransactions, almost by definition. In any case, hoping for a thing will not make it so.