qmail trouble

["Michal F. Hanula" <hanula9@kepler.fmph.uniba.sk>]

I have successfully installed qmail 1.02 (slink) and run it for months.
This morning it has suddenly stopped acepting messages from the outside 
world (remote -> local) --- local -> local and local -> remote works OK.

/var/log/mail.log contains several entries saying that 

[...] starting delivery <number>: msg <number> to local @tristvrte.fphil.uniba.sk

(should be ``to <username>@tristvrte.fphil.uniba.sk'').

I have compiled qmail (build-qmail from qmail-src), but haven't installed 
the  deb. (needed it for another machine). Could this be the reason?
Any ideas?
					aTdHvAaNnKcSe
						Miso&Frankie