Man pages matching name adgnumailconverter in section 1:

adgnumailconverter.1.en	debian 10 / addresses-goodies-for-gnustep
adgnumailconverter.1.en	debian 11 / addresses-goodies-for-gnustep
adgnumailconverter.1.en	debian 12 / addresses-goodies-for-gnustep