Add the nostr: before each npub. That's the standard most other clients use.
Discussion
Test
CC: nostr:npub10mtatsat7ph6rsq0w8u8npt8d86x4jfr2nqjnvld2439q6f8ugqq0x27hf nostr:npub1ng8zqsa04gzk5y4ch0nh43xrrpwqu27ydvf24s2cdzg5gv3upc7qycqjc0 nostr:npub132ny9cnwv5rjzw0ppk6ev34gn2n48zjejed2k0kcjxgawxt86mps7f9u95 nostr:npub14srklruqae9ynu3v9n393h87dcg9mc9lq2dqfrar4r0yk5wph9ts8vrvyl nostr:npub1rzg96zjavgatsx5ch2vvtq4atatly5rvdwqgjp0utxw45zeznvyqfdkxve nostr:npub1m64hnkh6rs47fd9x6wk2zdtmdj4qkazt734d22d94ery9zzhne5qw9uaks nostr:npub1hl0zy55rxqwd7anvf9nh9ms78kryee4zkf32nfwglgc5gmrm3hpqmslhas nostr:npub1pefpytg7h9wdmza97evpta73eyf94rq5mq5cn6h992eknm4xcljqq2tv2p nostr:npub19ffdhs6jgzedgpm58m6nq3a4s92zth0dx7vtwy9fkl9m9rp2w96svcqm5p nostr:npub1v7k63c6y2vktlqhsuupywt3yc7ykursujc34at964f9cv9s9y9csjutfk0 nostr:npub17nvfw7g53nxjghyd2zg552z06cke0jc0k69hj7ns7f9pw26j9kusap4u85 nostr:npub162zpxufpw8pnuytaf0gfxzkqtvk9rvcwkvppa7x57y3n7qkfpg4shatdhy nostr:npub134u08yp6rdcgcamfdcra9aysvhne9wpssft8ntm9qvfu95erxdcqx9qjkm
This was sent from primal.
