I might be mistaken, but I don't think the characters that the OP has provided would be lost on a varchar parameter. At least on my my instance the below SQL returns:
string
------------------------------
Jørgen Ørum <jørgen@ærø.dk>
aß?
CREATE TABLE #Test (string varchar(30));
GO

INSERT INTO #Test
VALUES
  ('Jørgen Ørum <jørgen@ærø.dk>'), --OPs example email
  ('αβγ'); -- Some more random Greek characters.
GO

SELECT *
FROM #test;

DROP TABLE #Test;
GO
So the only character that was "lost" was γ. I can't see why a varchar parameter would therefore be unhappy to receive the characters in the OPs post.