Suggestions for address checking software?

Hello all,

I was given some accurate tough love a few moons back by this sub and I highly appreciated it.

I'm spearheading a campaign to get a firm understanding of our lapsed donors and hopefully re-engage them; either we mark them as permanently lapsed or continue to engage. We have a list of 3k donors and I wanted to start thinning the list by weeding out bad addresses.

Does anyone have any suggestions for address checking software? I know USPS does it, I haven't looked too hard into what that process is, and I wanted to see who else is out there.

Thanks for your time.

submitted by /u/Garysuhnise
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