I receive donations thru 501c3 mission organization. Are gifts/donations taxable FED or SS? I solicit for donations. Gifts reported on 1099-misc box 3 or box 7?

FYI. I ask others, individuals and churches, to give to this mission work. It is an overseas mission working with indigenous Christians to share the Gospel, train pastors, provide bibles, and help with widows and orphans, even wells and buildings.  no western missionaries overseas except for volunteer mission trips. I also work on their websites and blogs to help increase the mission awareness to potential donors. It is purely a volunteer work. We do live off the donations but they are usually less than $25,000 per year. I am 65 this year and wife is 66.