Another idea, if you have root access to the elog server, you can temporarily make the elog config file unwritable to the elog user, nobody will be 
able to change it from the web interface. (and as root, you can edit it using emacs). But in general case, yes, it is better to setup a separate 
elog instance for what you do. Still, make the config elog unwritable by the elog user, so it cannot be hacked too easily. K.O.

I downloaded the last elog-3.1.5-1.tar.gz to install elog.

All *.cxx files are missing.

Certain characters contained in the 'Subject' will cause the text to split into multiple lines .

For example if  I enter "My Subject" in the 'Subject' field it is displayed as

My

Subject

If I enter "My_Subject" it is displayed as 

My_Subject

Is there any way to change this so no line breaks are created ?

There are two locations where 'Subject' is shown, the list display and the individual message display. I guess you mean the first one. 

In that case, you can modify the CSS styel sheet 'elog.css' and add following statement to the classes list2 and list2h:

.list2 {
   ...
   white-space: nowrap;
}  

.list2h {
   ...
   white-space: nowrap;
}  

Thanks for that bit of info . I had looked at that file but the answer was not obvious to me . Now I have to have an ELOG entry about , well , ELOG :}

Is there somewhere I can change the file extension / app associations ? When I open an ".ods" attachment ELOG lets me pick the app . If I open a ".eml" it dumps me into the browser. At the system level ".eml" is associated with "thunderbird"

ELOG on RPI4B , 3.1.5

Client Kubuntu Linux 

I was thinking I could accomplish this with some 'attribute' change but havent fogured it out yet .

My preference would be for elog to ask everytime .

Below are the MIME types hard-coded into elogd. As you can see there is neither .ods nor .eml. If you give me the MIME type, I can add that easily. I wonder however why both work differently for you. I believe this is a browser setting.

Stefan

struct FILETYPE {
   char ext[32];
   char type[80];
} filetype[] = {
        {".AI",   "application/postscript"},
        {".ASC",  "text/plain"},
        {".BZ2",  "application/x-bzip2"},
        {".CFG",  "text/plain"},
        {".CHRT", "application/x-kchart"},
        {".CONF", "text/plain"},
        {".CSH",  "application/x-csh"},
        {".CSS",  "text/css"},
        {".DOC",  "application/msword"},
        {".DVI",  "application/x-dvi"},
        {".EPS",  "application/postscript"},
        {".GIF",  "image/gif"},
        {".GZ",   "application/x-gzip"},
        {".HTM",  "text/html"},
        {".HTML", "text/html"},
        {".ICO",  "image/x-icon"},
        {".JPEG", "image/jpeg"},
        {".JPG",  "image/jpeg"},
        {".JS",   "application/x-javascript"},
        {".KPR",  "application/x-kpresenter"},
        {".KSP",  "application/x-kspread"},
        {".KWD",  "application/x-kword"},
        {".MP3",  "audio/mpeg"},
        {".OGG",  "application/x-ogg"},
        {".PDF",  "application/pdf"},
        {".PNG",  "image/png"},
        {".PS",   "application/postscript"},
        {".RAM",  "audio/x-pn-realaudio"},
        {".RM",   "audio/x-pn-realaudio"},
        {".RM",   "audio/x-pn-realaudio"},
        {".RM",   "audio/x-pn-realaudio"},
        {".RPM",  "application/x-rpm"},
        {".RTF",  "application/rtf"},
        {".SH",   "application/x-sh"},
        {".SVG",  "image/svg+xml"},
        {".TAR",  "application/x-tar"},
        {".TCL",  "application/x-tcl"},
        {".TEX",  "application/x-tex"},
        {".TGZ",  "application/x-gzip"},
        {".TIF",  "image/tiff"},
        {".TIFF", "image/tiff"},
        {".TXT",  "text/plain"},
        {".WAV",  "audio/x-wav"},
        {".XLS",  "application/x-msexcel"},
        {".XML",  "text/xml"},
        {".XSL",  "text/xml"},
        {".ZIP",  "application/x-zip-compressed"},
        /* Open XML file types */
        {".DOCM", "application/vnd.ms-word.document.macroEnabled.12"},
        {".DOCX", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"},
        {".DOTM", "application/vnd.ms-word.template.macroEnabled.12"},
        {".DOTX", "application/vnd.openxmlformats-officedocument.wordprocessingml.template"},
        {".PPSM", "application/vnd.ms-powerpoint.slideshow.macroEnabled.12"},
        {".PPSX", "application/vnd.openxmlformats-officedocument.presentationml.slideshow"},
        {".PPTM", "application/vnd.ms-powerpoint.presentation.macroEnabled.12"},
        {".PPTX", "application/vnd.openxmlformats-officedocument.presentationml.presentation"},
        {".XLSB", "application/vnd.ms-excel.sheet.binary.macroEnabled.12"},
        {".XLSM", "application/vnd.ms-excel.sheet.macroEnabled.12"},
        {".XLSX", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
        {".XPS",  "application/vnd.ms-xpsdocument"},
        {"",      ""},
};