[exim] retry time not reached for any host after a long fail…

Hello,

what means a line like this:

2007-03-11 06:16:57 1HQGQL-00041b-7z ** pf000@???
<pf002@???> R=mailbox_cyrus T=mailbox_lmtp: retry time not
reached for any host after a long failure period

The user exists, it works fine when I'm doing a manual lmtp-session.

A "exim -bt pf000@???" returns

pf000@???
     <-- default@???
   router = mailbox_cyrus, transport = mailbox_lmtp

a "exim -bt pf002@???" returns

pf000@???
     <-- default@???
     <-- pf002@???
   router = mailbox_cyrus, transport = mailbox_lmtp

and a "exim -bt default@???" returns
pf000@???
     <-- default@???
   router = mailbox_cyrus, transport = mailbox_lmtp

What does this mean?

Regards
Marten lehmann