Biblically speaking, it is impossible to obey the instructions given in Malachi 3:10 today.  Why?  Because the "House" that Malachi is referring to is the Temple at Jerusalem.

The Temple at Jerusalem was God's House.  Once General Titus ad his army of 24,000 Roman soldiers destroyed, God no longer had a physical man-made building as His House. (Acts 7:48; 17:24)  Today, WE are God's House.  He lives in us...lively stones built upon the foundation laid by the apostles and prophets of the Bible   And no other foundation can be laid than that is laid, which is Jesus Christ.

The "blessing" promised in Malachi 3:10 is predicated upon obedience to the instructions given.    The instructions are to bring ONE PERCENT of Israel's agricultural crops to the Temple at Jerusalem.

Are you taking one percent of Israel's crops to the Temple at Jerusalem?  No?  Then you shouldn't be claiming nor should you be expecting the blessing promised in Malachi 3:10.

By the way, the "blessing" promised in Malachi 3:10 is that rain will fall from Heaven, thereby watering the fields of Israel with an end result of an over-abundant harvest of agricultural crops.