Please help: error after upgrade to version 2.1.16

[Edgar Pettijohn III]

I think you may need something similar to:

protocols = imap pop3 lmtp sieve
service auth {
  unix_listener auth-userdb {
    group = _smtpd
    mode = 0666
    user = _smtpd
  }
}
service imap-login {
  inet_listener imap {
    port = 143
  }
  inet_listener imaps {
    port = 993
    ssl = yes
  }
}
service managesieve-login {
  inet_listener sieve {
    port = 4190
  }
  inet_listener sieve_deprecated {
    port = 2000
  }
}
service pop3-login {
  inet_listener pop3 {
    port = 110
  }
  inet_listener pop3s {
    port = 995
    ssl = yes
  }
}