Based on the fact that he took the time to write it, he obviously thinks it's important. On the other hand, since he
A. Didn't use a legitimate email address and,
B. Did not provide any specific concrete examples of what he's talking about,
there's basically nothing you can do other than ask for feedback from the community as a whole, which you've done.
Is the source badly maintained? Or is it just not maintained according to this guy's personal standards? For criticism to be constructive, it must include specific examples of what's wrong, and suggestions for improvement. Otherwise, it's a waste of time, no matter how well-intentioned.

Speaking as a non-contributor (I've never even looked at the source code), I'd like to say that I think curl is a very useful and helpful product. And as long as it continues to fulfill my requirements, I'll continue to use and recommend it.

===============================
Howdy friends

I received this mail and I thought as this isn't exactly to me personally, but
to the "project", I could forward it for further knowledge. I've removed the
senders name and email.

I tried to reply to this mail, but the sender used an email address that
doesn't work!

Regarding the contents, I don't have much to say. It is just... vague and
without details.

-- 
      Daniel Stenberg -- http://curl.haxx.se -- http://daniel.haxx.se 
       Dedicated custom curl help for hire: http://haxx.se/curl.html 
---------- Forwarded message ----------
Date: Mon, 07 Feb 2005 14:54:50 -0800
From: Anonymous User
To: Daniel Stenberg
Subject: My perception of curl
This may be an entirely wrong perception, but having got the
cvs from haxx.se and several downloads at different versions,
I would say that this is a very badly maintained and badly
organised project.
That is not to say that it does not work - when it does work.
For me it does not work and I do not feel that  a poorly
maintained source distribution can maintain its status as a
good project in the years that we are about to face.
I hope that you will endeavor to ensure that curl is more
rigourously maintained with respect to both source and
supporting library file in the future.
Cheers, 
Bill Mercer - National Center for Construction Education and Research 
3600 NW 43rd St
Gainesville, Florida  32606
http://www.nccer.org
Phone 352-334-0911 Fax 352-334-0932
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