Any ideas what this refers to?
Does this mean that the private key supplied for signing is broken?
Aug 18 13:19:36 mta1 kumod[1755072]: stack traceback:
Aug 18 13:19:36 mta1 kumod[1755072]: [C]: in local 'poll'
Aug 18 13:19:36 mta1 kumod[1755072]: [string "?"]:4: in field 'rsa_sha256_signer'
Aug 18 13:19:36 mta1 kumod[1755072]: [string "/opt/kumomta/etc/policy/init.lua"]:232: in upvalue 'sign_msg'
Aug 18 13:19:36 mta1 kumod[1755072]: [string "/opt/kumomta/etc/policy/init.lua"]:298: in function <[string "/opt/kumomta/etc/policy/init.lua"]:276>
Aug 18 13:19:38 mta1 kumod[1755072]: 2026-08-18T13:19:38.283115Z INFO localset-0 kumod::spool: start_spool: enumeration done, spooled in 135 msgs over 20.005151654s 7/s
Aug 18 13:19:38 mta1 kumod[1755072]: 2026-08-18T13:19:38.284121Z INFO localset-0 kumo_server_common::start: initialization complete
Aug 18 13:19:41 mta1 kumod[1755072]: 2026-08-18T13:19:41.516934Z ERROR smtpsrv-0 run{socket=TcpStream { addr: 127.0.0.1:2525, peer: 127.0.0.1:56118, fd: 99 }}: kumod::smtp_server: Error in SmtpServerSession: Data { key_data: [X,X,X,X,X }: failed to load private key: openssl private_key_from_pem: error:1E08010C:DECODER routines:OSSL_DECODER_from_bio:unsupported:../crypto/encode_decode/decoder_lib.c:101:No supported data to decode. Input type: PEM. openssl private_key_from_der: error:0680009B:asn1 encoding routines:ASN1_get_object:too long:../crypto/asn1/asn1_lib.c:95:, error:06800066:asn1 encoding routines:asn1_check_tlen:bad object header:../crypto/asn1/tasn_dec.c:1188:, error:0688010A:asn1 encoding routines:asn1_item_embed_d2i:nested asn1 error:../crypto/asn1/tasn_dec.c:349:Type=RSAPrivateKey. Ed25519 SigningKey::from_pkcs8_der: PKCS#8 ASN.1 error: unknown/unsupported ASN.1 DER tag: 0x22. Ed25519 SigningKey::from_pkcs8_pem: PKCS#8 ASN.1 error: PEM error: PEM preamble contains invalid data (NUL byte)
