snmpd[12590]: kvm_openfiles: /dev/ksyms: Permission denied

  snmpwalk -On -c COMMUNITY -v 1 imap4.EXAMPLE.COM .1.3.6.1

will return some 2800 lines

 snmpwalk -On -c COMMUNITY -v 1 imap4.EXAMPLE.COM .1.3.6.1.2.1 | grep STRING 

iso.org.dod.intemet.mgmt.mib-2
1   3   6   1       2    1

 snmpwalk -On -c COMMUTITY -v 1 imap4.EXAMPLE.COM .1.3.6.1.2.1 | grep STRING |head -10
.1.3.6.1.2.1.1.1.0 = STRING: NetBSD imap4 9.3 NetBSD 9.3 (GENERIC) #0: 
        Thu Aug  4 15:30:37 UTC 2022  
        mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/amd64/compile/GENERIC amd64
.1.3.6.1.2.1.1.4.0 = STRING: Me <me@somewhere.org>
.1.3.6.1.2.1.1.5.0 = STRING: imap4
.1.3.6.1.2.1.1.6.0 = STRING: Right here, right now.
.1.3.6.1.2.1.1.9.1.3.1 = STRING: The SNMP Management Architecture MIB.
.1.3.6.1.2.1.1.9.1.3.2 = STRING: The MIB for Message Processing and Dispatching.
.1.3.6.1.2.1.1.9.1.3.3 = STRING: The management information definitions for the SNMP 
        User-based Security Model.
.1.3.6.1.2.1.1.9.1.3.4 = STRING: The MIB module for SNMPv2 entities
.1.3.6.1.2.1.1.9.1.3.5 = STRING: View-based Access Control Model for SNMP.
.1.3.6.1.2.1.1.9.1.3.6 = STRING: The MIB module for managing TCP implementations

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