To send and receive signed or encrypted messages, you should specify both a digital signing certificate and an encryption certificate.
Richin yetaq chuqa' yek'ul taq rutzijol ri ejuch'un kib'i' chuqa' ewan rusik'isik, k'o chi nijikib'äx jun riqitzijib'al kematz'ib'il juch'un b'i'aj chuqa' jun riqitzijib'al ewan rusik'ixik.