> the following should do the job:
> 
> <div style="width: 200px">
> <img src="IMG_3133.jpg" style="width: 100%" />
> </div>
> 
> the configurable parameter should be with obviously :-)

Unfortunately not. Please find attached the screen dump from such a try, together with the HTML code.
As you can see, the little elog icon is stretched to the same width as the upper (large) picture.

> elog sends wrong HTTP headers, charset is empty and not separed from the
> next one "Connection: Keep-Alive ... this bug tells the browser that the
> encoding is "connection:" ... that is wrong.

This has to do with the "%S" vs. "%s" bug described elsewhere in this forum. 
I fixed that. The validator link above now also reports error free.

I added ths missing tags. The validator at least does not complain any more.

> current version uses strstr() to check if the file has the expected ascii
> text extension ... this is buggy becouse this way a file named
> ".txt_hidden_file" or "foo.config.dat" are both seen as .txt files.

I added your routine chkext() to the code, but actually use it differently. I
display now ASCII files not by their extension, but the code checks for each file
to contain non-printable characters. If it contains all printable letters, and does
not have the extension PDF, PS or EPS, it's shown inline.

Are you sure that this does not stretch small images? Please see elog:931

> two new elog.conf parameters are defined:
> Attached image width          ; width of full view image attached
> Attached image width entry    ; width of attached image in the entry list view

I would rather go with a new class in the CSS file to contain this options, since I 
want to keep the number of options as small as possible.

What you can try is to debug the communication between elogd and the SMTP
server. Just turn on logging via

Logfile = log.txt
Logging level = 3

After sending email, you see the conversation in log.txt. Maybe this gives you
some hints.

> 1. When replying to another reply in a thread, the author_name attribute is
> not substitued (as desired). Since this is a mandatory field, we are not
> able to send the reply message. However, reply to the originial message
> works fine.

Preset on reply Author = $long_name

Do not use "Remove on reply".

> 2. "Use Email From = string" prepends an additional "" to the "From"
> field in the e-mails.

This has been fixed recently, please update.

> 3. "Fixed Attributes Reply = Subject" fixes the subject line while replying.
> However when we add "Category" attribute to this list, it breaks.

I tried to use your config file and add

Fixed attributes reply = Subject, Category

and it worked as expected. What kind of "break" did you observe?

> For me, when I put the Category in the fixed attributes for reply, I see the
> Category but when I actually try to send the message - it says Category not
> entered. I am sure I am doing something very stupid. Please help.

No, it was a bug, which I could reproduce now. I fixed it in revision 1.554. It will
be contained in the next release.