"Later tell" fails silently when bot isn't authed

[offby1]

2014-10-07T15:02:34Z Doing for offby1: later ("tell" "wasamasa" "he" "always" "says" "it" "used" "MemoSrv," "but" "the" "truth" "is" "he" "merely" "_tries_;" "memosrv" "might" "well" "ignore" "it")
2014-10-07T15:02:34Z => PRIVMSG memoserv :send wasamasa offby1 says: he always says it used MemoSrv, but the truth is he merely _tries_; memosrv might well ignore it
2014-10-07T15:02:34Z => PRIVMSG #emacs :*offby1: I asked `MemoServ' to forward the message to wasamasa.
2014-10-07T15:02:34Z <= ((prefix #"MemoServ!MemoServ@services.") (command #"NOTICE") (params (param #"rudybot") (param #"You are not logged in.")))
2014-10-07T15:02:34Z MemoServ said "NOTICE rudybot :You are not logged in.", which I don't understand